When you create a text index in MongoDB, you have the option of applying different weights to each indexed field.

These weights denote the relative significance of the indexed fields to each other. A field with a higher weight will have more impact in the search results than a field with a lower weight.

This provides you with a certain amount of control over how the search results are calculated.

The default weight is 1, so if you don’t specify a weight for field, it will be assigned a weight of 1.

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MongoDB provides us with the ability to create wildcard text indexes.

Wildcard text indexes are similar to wildcard indexes, except that wildcard text indexes support the $text operator, whereas wildcard indexes don’t.

That said, creating each index type is very similar in the sense that they both share the wildcard $** field pattern.

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In MongoDB, you can use the getIndexes() method to get a list of indexes on a collection.

You can also loop through each collection in a database to return all indexes in the database.

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In MongoDB, you can create an index on a collection using the createIndex() method, the createIndexes() method, or the createIndexes administration command.

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There are several ways to create an index in MongoDB, and from MongoDB 4.2, we can create wildcard indexes.

A wildcard index can be thought of as a kind of filter that automatically matches any field, sub-document or array in a collection and then indexes those matches.

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