Indexes allow you to quickly search for specific information. When you’re frequently querying the same information it is recommended to create an index for this field. Do not index all your fields, this will actually reduce the performance of your application rather than increasing it.
Text indexes are used by MongoDB to allow you to query a collection for Documents matching the text. Like a search engine.
They are easily created like this:
try collection.createIndex(withParameters: .text(["keys", "in", "document"]))
Unique indexes require any documents inserted in the collection to have a unique value for this key.
try collection.createIndex(withParameters: .unique, .compound(fields: [ "uniqueKey": 1, "otherUniqueKey": 1 ]))