i was a bit overwhelmed with all the different indexes. Is there some documentation on when i want to use a certain index over the other?

My usecase is I have 1000s of tweets collected and I want to ask the llm to find ones with certain subjects or summarize tweets based on a certain search criteria.

Edit: taking a look at https://gpt-index.readthedocs.io/en/latest/guides/index_guide.html