Explain that Couchbase Services automatically keep themselves up-to-date with the data service

From a Discord discussion:

Hi, if i have a full text search index, and a product i the index changes, how can I update the index? if i update the document in couchbase bucket, will the fts index get updated?

So let's say I have a document that represents a product. A product has a name. If the name changes, will a user be able to find the product with a search query containing the new name? I have not been able to find info on this in your documentation.  Our products are constantly changing throughout the day, we need the FTS index to always be updating...

After explaining to him:

All of the Couchbase services are meant to be updated in real-time (as-real-time-as-possible) and keep themselves in sync with the documents flowing through the Data Service.

He suggested:

Maybe just add a section to the FTS document on what happens when a document in the index changes