Are forum posts indexed?

Question

Google

Are forum posts indexed?
If there are enough keywords

Answer 1

Well, do you want me to tell you better than I did in your previous question ?
I can do it again:
If you monitor the QUALITY of the content in the questions and answers through an automatic filter (spam, links, obscene language, advertising, etc.), and they are useful to other people, there will not be " overloads" (read "cheating") tags and keywords, the forum will be convenient in stylistically and visual terms and when searching for information, and it will also be convenient to use it on any device that allows you to view web pages from the Internet, there will be correct JSON-LD markup and timely notification of search engines about the appearance of new content...
...then there are chances to get to the 1st page on those topics, the answers to which you have more accurate and complete answers than on competing resources.
(about paid advertising - this is a separate topic)
Well, briefly about "SEO-gold" : low-frequency queries that are not yet in the PS, but are already gaining public interest in this topic: you should always position the resource ahead of the start of interest in the topic and give the most reliable and detailed information. (scope and direction - any)
Read the key points on SEO optimization: here .

Answer 2

Indexing has nothing to do with the number of "keywords" or their presence.
Keywords are generally a virtual concept, all words on the page are "key" for the search.
Learn materiel.

Answer 3

on WHICH of them?