Services
ASO School
English

ASO School

You can learn about ASO, App marketing, app store optimization and app promotional strategies here and gain the latest app market news and analysis. Helping you to carry out app store optimization and promote app data growth.

Keyword Library Construction and Management: Building Your Own ASO Optimization Hub

2025-11-27

 
 
In the mobile app ecosystem, customer acquisition costs continue to rise, making organic traffic the critical battleground that determines a product's survival or demise. Yet, many developers and marketing teams find themselves trapped in a repetitive and inefficient cycle during the app store optimization (ASO) process: before each app update, the team hastily scrambles to fill the limited 100-character keyword field based on gut feelings; or they watch their competitors' rankings soar without having any clue about the strategic logic behind it; even more commonly, each optimization attempt feels like a fresh gamble, with no ability to draw on past data to accumulate experience, resulting in a growth curve that fluctuates wildly.
The root cause of these common challenges often lies not in neglecting the importance of ASO, but rather in the lack of a systematic, data-driven, and sustainable strategic core for optimization efforts—a truly efficient keyword library. Without this "optimization hub," your keywords are like an army without a command center: scattered and unable to coalesce into a formidable fighting force. In this article, we will systematically dissect how you can build and manage this core engine that drives continuous ASO growth—from scratch—transforming your optimization efforts from a "handcrafted workshop" into a "modernized command center."
 
 
 

Part One: Cornerstone Chapter - Comprehensive Collection of Keywords "Raw Materials"

 
The first step in building a keyword library is to conduct comprehensive, multi-faceted information gathering, ensuring that our "raw materials" are both thorough and accurate.
 
  1. Core Brainstorm: Deeply Deconstructing Product Value
Temporarily forget about the "keywords" themselves, and return to the essence of the product. Organize a cross-departmental brainstorming session (involving product, marketing, and operations teams), focusing on the following core questions:
  • What fundamental problem does our product solve for our core users?
  • In what specific scenarios do users use our product?
  • What are the product's most unique and competitive features?
  • What is the core brand image we want to convey to the market?
Through this discussion, you will obtain a set of "seed keywords" that are most relevant and most core in value.
 
  1. Competitor Analysis: Conducting Precise Competitive Intelligence Analysis
Systematically analyze your direct and indirect competitors to identify market gaps and assess the competitive landscape. Key actions include:
  • Metadata deconstruction: Analyze which high-priority keywords competitors have placed in their titles and subtitles (the positions with the highest weight), and which ones are mentioned only in the descriptions. Extract their core value propositions and functional keywords.
  • Keyword Coverage Analysis: Using AppFast's ASO keyword tool, comprehensively scan the keyword matrices covered by competing apps, with a particular focus on:
    • They are top-ranked high-traffic keywords (popularity score above 40). Subsequently, you can supplement these into the metadata based on your product specifics.
    • They have not yet formed monopolies in long-tail keywords (popularity 10-40). These keywords have low search volume, but low competition, clear user intent, and high conversion rates.
 
 
  • User Reviews Mining: Extract words from competitors' user Reviews that users use to describe their strengths and pain points.
 
 
  1. User language collection: gaining insights into genuine search intentions
To avoid self-indulgence, you must learn to speak the language of your users. Real user search terms are hidden in these places:
  • App store Reviews: Whether it's your own app's review section or that of your competitors, they're both rich sources of natural user language.
  • Customer service and user feedback: Directly collect how users describe the problems and needs they encounter.
  • Search engine auto-suggestions: Enter the core keyword in the app store search box; the dropdown auto-suggestions provide the most direct reference.
 
  1. Tool Extension: Leveraging the Data Engine to Drive Discovery
Use the keyword expansion feature of the professional ASO tool AppFast. Enter your "seed keywords," and the tool will provide you with, based on massive amounts of data:
  • Related keyword recommendations and their estimated search volumes.
  • Keyword competition difficulty index.
  • Relevant long-tail keyword variations and synonyms.
 
 
Once you've completed your initial keyword collection, would you like to know which keywords can bring you the most value? Why not use AppFast's Keyword installation With our ranking improvement service, our algorithm experts will help you accurately identify high-potential targets from a vast pool of entries, quickly achieve breakthroughs in rankings, and turn data insights into real growth in downloads.
 
 
 

Part Two: Building Section - Constructing a Structured Keyword Hub System

 
The original vocabulary was disorganized; the goal of this phase is to systematize it and build a decision support system with a clear hierarchy and well-defined strategies.
 
Step 1: Data Cleaning and Standardization
Pre-process the collected raw vocabulary to lay a solid foundation for subsequent analysis:
  • Remove completely duplicate entries.
  • Normalize and standardize singular and plural forms, common variants, and misspellings.
  • Initially filter out noisy words that are clearly irrelevant to the product, thereby improving the overall quality of the lexicon.
 
Step 2: Multi-dimensional Tagging — From Lists to Strategies
This is the core step in transforming data into strategy. You need to assign multi-dimensional tags to each keyword:
  • Type tags: Identify the basic attributes of keywords, such as brand terms, competitor terms, industry-wide terms, long-tail terms, and scenario-specific terms.
  • Intent labels: Classify according to user search intent.
    • Navigational intent: The user is explicitly looking for a specific brand or product, with a clear intent.
    • Informational intent: Users aim to seek answers or learn about a certain type of information, and are in the exploration stage. For example, searching for "how to edit photos" or "the best note-taking app."
    • Transactional intent: Users have a clear intention to download, purchase, or use a product, resulting in the highest conversion value, such as searching for "download stock trading software."
 
  • Priority labels: After comprehensively considering "relevance," "search volume," and "competition level," assign a strategic priority to each keyword.
    • P0 (Core Focus): High search volume, high relevance—these are areas where we can go all-in.
    • P1 (Strategic Cultivation): Moderate search volume and high relevance, or high search volume and moderate difficulty, to be prioritized for growth.
    • P2 (Long-tail coverage): Low search volume, high relevance, used to build defensive barriers and supplement traffic.
    • P3 (Observation and Monitoring): Keywords that are not currently adopted but require ongoing attention.
 
Step 3: Data Injection and Quantitative Evaluation
Give strategies the wings of data. Associate each keyword with the following core metrics to establish a quantitative evaluation system:
  • Search volume index: Measures the scale of user demand behind a keyword.
  • Competition Difficulty Index: Evaluates how easy or difficult it is to achieve a high ranking for this keyword.
  • Relevance Ratings: Internal ratings based on the degree of alignment with the product's own features (e.g., 1 to 10 points).
  • Traffic Value: A comprehensive evaluation metric provided by some tools, measuring the potential value of a keyword.
 
Step 4: Select the platform and structured storage.
Choose an appropriate platform to host your keyword library. In the initial stage, a structured Excel file or Google Sheet is sufficient. Make sure your database includes the following fields: keywords, type, intent, priority, search volume, difficulty, relevance, current ranking, and last updated date, among others.
 
Building a scientific keyword library is the cornerstone of ASO success, but this process is often time-consuming and labor-intensive. If you'd like to kickstart your optimization efforts more efficiently, our ASO experts can create a customized, exclusive app keyword library for you—at no charge—combining your product positioning and market data to map out a clear optimization roadmap for you. Now Contact customer service, Get your free customized plan.
 
 

Part Three: Management - Driving the Continuous Evolution of the Keyword Database

 
A static vocabulary will quickly become obsolete. Your keyword library must be a living system that continuously iterates and self-optimizes, forming a complete "Plan-Do-Check-Act" closed loop.
 
  1. Establish a mechanism for regular updates and audits.
Workflow the maintenance of the keyword library, and set a clear review cycle:
  • Quarterly review: comprehensively examine market trends and competitor activities, and update the core keyword list.
  • Version synchronization: Before each major app update, update the keyword library according to the new features.
  • Tool calibration: Regularly use ASO tools to refresh keyword search volume and difficulty data.
 
  1. Form a closed loop for effect tracking and data feedback.
This is the key to connecting strategy with practice and achieving data-driven decision-making. After deploying keywords, you must:
  • Track ranking changes: Monitor the ups and downs of core keywords and nurtured keywords.
  • Analyze traffic contribution: Associate keywords with actual conversion data such as download volume and activation volume.
  • Mark entry status: Provide feedback on results in the lexicon, for example, marking entries as "High-Performance Words," "Potential Words," "Invalid Words," or "Words Pending Testing."
 
  1. Implement dynamic optimization and iteration strategies.
Based on feedback data, proactively adjust your ASO strategy:
  • Resource allocation: Optimize resource allocation (such as prime positions for titles and subtitles) by favoring verified "high-performing keywords" and "potential keywords."
  • A/B test-driven: For keywords with unclear performance, design A/B tests to verify their effectiveness.
  • Metabolism: Decisively eliminate "ineffective words" that consistently perform poorly, and replace them with new candidate words from the lexicon.
 
 

Concluding remarks: From tactical execution to strategic asset management

 
Building and managing a keyword library may seem at first glance like adding another basic task, but in reality, it represents a pivotal leap—from passively and sporadically executing tactical ASO optimizations to proactively and systematically managing ASO as a strategic initiative. It ensures that every optimization iteration is grounded in historical data and clear strategies, ultimately transforming this ever-evolving keyword library into an indispensable, living digital asset for your product in the competitive market.
 
An excellent keyword strategy starts with an accurate diagnosis of the current situation. Are there any potential optimization blind spots in your app's metadata? Now you can get a free metadata diagnostic report from AppFast experts, which comprehensively evaluates your title, subtitle, icon, and screenshots, identifies overlooked growth opportunities, and helps you achieve twice the results with half the effort.
 
Free consultation with ASO specialists
Doing ASO for the first time or have no idea how to carry out targeted optimization of your app? We offer one-on-one customized services provided by app marketing specialists
Freeconsultation