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Overview
Thumbnails and covers decide whether your content gets a click or a swipe. This category goes deep into what actually moves CTR: sharp hierarchy, legible type at mobile sizes, disciplined color/contrast, and platform‑correct exports.
Expect clear specs and safe areas for major surfaces: YouTube thumbnails (1280×720, 16:9), vertical video covers for Shorts/TikTok/Reels (1080×1920; center‑safe for grid/feed crops), podcast cover art (3000×3000, sRGB), blog/link previews via Open Graph (1200×630), and eBook covers (1600×2560 portrait). You’ll also find repeatable workflows, naming/versioning tips, and practical testing methods, including YouTube’s Test & Compare.