Signals
Individual signals, what they are worth, and what happens when they are missing.
One signal at a time: what it is, why it weighs what it weighs, and what a failure actually costs.
AI crawler permissions: what that robots.txt line actually controls
AI training and AI answers are different jobs. Read the crawler rule before changing it so you know which use of your content you are allowing.
Answer-first is 25 words, and three tools had to agree on how to count them
In September 2026 two checkers in this portfolio reported different word counts for the same page. The cause was a function nobody had looked at in a year, and fixing it changed how every number in the family is produced.
Why a good site from 2019 reads hot for search and cold for AI
The most common shape in the readings is a site scoring in the eighties for Search Visibility and the forties for AI Discoverability. Nothing it did was wrong when it was built. That is the whole problem.