Technology & Platforms

Ranking systems used by digital platforms and services — app store rankings, content charts, and marketplace ranking logic, explained at a high level.

Amazon Best Seller Rank — How Products Are Ordered How Amazon's Best Seller Rank works: recent sales velocity within categories, hourly updates, sales history decay, and how sellers interpret BSR.
Apple App Store Rankings — How Apps Are Ordered How the Apple App Store ranks apps: download velocity, ratings and reviews, metadata relevance, engagement signals, editorial featuring, and known limitations.
Google Play Store Rankings — How Apps Are Ordered How Google Play ranks apps: install velocity, ratings, retention and uninstalls, Android vitals, metadata relevance, and how it differs from Apple's App Store.
Podcast Chart Ranking Systems — How Shows Are Ordered How Apple Podcasts and Spotify charts rank podcasts: follows and listening velocity over lifetime downloads, category segmentation, and chart-gaming concerns.
Spotify Chart Rankings — How Songs and Artists Are Ordered How Spotify charts rank music: stream counting windows, daily and weekly charts, editorial vs algorithmic playlists, and chart-manipulation concerns.
Steam Game Ranking System — How Games Surface on the Store How Steam ranks games: top-seller revenue charts, recent and overall review scores, wishlists, the personalized Discovery Queue, and visibility-rounds mechanics.
YouTube Video Ranking System — How Videos Are Recommended How YouTube ranks videos: watch time, click-through rate, engagement and satisfaction signals, personalization across Home, Suggested and Search — at a high level.