Documentation unclear

[oliverhausler]

"Only callers that observed the user visit a site about the topic in question within the past three weeks can receive the topic." is not a correct sentence and it doesn't become clear to an outsider what it means.

https://github.com/patcg-individual-drafts/topics/blob/main/README.md?plain=1#L88

[jkarlin]

It's a difficult concept to convey, but the sentence is accurate and correct. Suggestions welcome.

[relevance-api-topics]

found it helpful while checking Topics API capability with 3pc naturally.