A: The Tier 1 "300 multi-document chat page limit" refers to a 300-page restriction per query. This means you can engage in conversations involving any number of documents as long as the total page count for each question does not exceed 300 pages.

For instance, if you have a set of documents labeled 'Label A' totaling 250 pages, and another set under 'Label B' totaling 150 pages, you could pose a question regarding the documents in 'Label A'. Alternatively, you could ask a different question concerning the documents in 'Label B', provided each set used in a single query stays within the 300-page limit.