Guides
These notes explain the assumptions behind the tools. They are writing advice, not a promise about rankings.
Title length versus pixels
Why two titles with the same count can clip differently.
Writing a description in 100–155 characters
How to finish a sentence inside this site’s target.
Reading a heading outline
What several H1 headings tell you about a draft.
What a robots.txt line means
User-agent, Allow, Disallow, and Sitemap in plain language.