Eight Dimensions, Weighted by Niche
Each dimension carries a niche-specific weight: gaming weights the hook and emotional charge, finance weights numbers and front-loading. The dimensions then split into two pillars, value (does the title give a reason to click?) and craft (is it well built?), which blend geometrically so polish can't carry a title that promises nothing. The “biggest tweak” line in the score rail is computed, not advisory: it names the sub-component whose lift to full marks is worth the most weighted points right now.
Truncation Is Measured in Pixels
YouTube renders titles in Roboto, where an "i" takes about 5px and a "W" about 14px, so the cut lands at a pixel budget rather than a character count: 340px in the mobile feed, 408px in search, 640px on the watch page. A title of 55 narrow characters can fit where 50 wide ones don't, which is why the surface previews sometimes disagree with generic 60-character advice, and why cuts that sever a content word score worse than cuts at a word boundary.
Crowding: Match the Format, Differ on the Specifics
The competitor check strips the shared search phrase before comparing anything, since ranking for the same words is how you enter the race, and it reports your format without a verdict, because a format that dominates a results page is usually the format that audience clicks. What does get scored is your opening words, the modifiers you wrap around the keyword, and the kind of promise you make, each against your closest single competitor rather than the group average.
Deterministic on Purpose
Every signal is a lexicon hit, a character count, or a pattern match, running synchronously in your browser. No model, no network call, which is why the score updates on every keystroke and never drifts between runs. The trade: it reads structure and wording, not search demand. Pair it with a keyword tool for the demand half.