As you can see, the options for data storage, access, and analysis are legion. There are solutions to cater for all of your needs.
How you segment and store your data is highly dependent on its use case. Not every project will need a search index or relational database, but they are easily reachable if you need them. Be mindful that services come at a cost and that misuse of the services is likely to end up in an expensive bill each month. Experimentation to determine the best use of services will pay dividends, not only in budgetary terms, but in terms of speed of data access and the responsiveness of your application.
This chapter covered various aspects of persistence services provided by AWS. The next chapter will discuss various techniques for processing the data in your infrastructure, especially in the field of machine learning.