> Portal Navigation:
> 
> - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version.
> - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages).
> - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`).
> - Top-level index of all portals: https://dev.wix.com/docs/llms.txt
> - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt

## Resource: Introduction

## Article: Introduction

## Article Link: https://dev.wix.com/docs/api-reference/business-solutions/cms/collection-management/indexes/introduction.md

## Article Content:

# About the Indexes API

> **Note for app developers:** Wix Data APIs require the site's [code editor](https://dev.wix.com/docs/develop-websites/articles/get-started/development-environments.md) to be enabled. If you are building a Wix app, add a [data collections extension](https://dev.wix.com/docs/build-apps/develop-your-app/extensions/backend-extensions/data-collections/about-data-collections-extensions.md) to automatically enable the code editor and create data collections when your app is installed on a site.


The Indexes API enables you to create indexes for data collections, to make querying data faster.

An index is a map of a collection's data, organized according to fields that you select. An index [increases the speed of queries](https://dev.wix.com/docs/api-reference/business-solutions/cms/collection-management/indexes/indexes-and-query-speed.md) by providing a query with a shortcut to the information it's looking for. Instead of iterating through every data item in the collection, a query can use the index to skip to potentially relevant items. The larger a collection is, the more time this saves.

With the Indexes API, you can:
- Create regular indexes to accelerate query speed.
- Create unique indexes to enforce unique values.
- Access and drop existing indexes.

To learn about the differences between regular and unique indexes, see [Index Types](https://dev.wix.com/docs/api-reference/business-solutions/cms/collection-management/indexes/index-types.md).

## Before you begin

It's important to note the following points before starting to code:

- A collection can have up to 3 regular indexes (for up to 3 fields per index). It may also have 1 unique index (for 1 field).
- Some indexes are [generated by Wix automatically](https://dev.wix.com/docs/api-reference/business-solutions/cms/collection-management/indexes/index-types.md). These indexes don't count towards the index limit.
- The value contained in an indexed field can't be larger than 982 bytes, including the collection name. For example, in a collection named "Products", the maximum length of each value in the indexed fields is 974 bytes.
- When an index creation fails, the failed index still occupies a slot. To remove the failed index and free up the slot for a new index, call [Drop Index](https://dev.wix.com/docs/api-reference/business-solutions/cms/collection-management/indexes/drop-index.md).
- Case-insensitive filters, such as `$startsWith`, aren't accelerated by an index.

## Use case
+ [Optimize query performance for a collection with multiple indexes](https://dev.wix.com/docs/api-reference/business-solutions/cms/collection-management/indexes/sample-flows.md)

## Terminology

- **Regular index:** An index that increases query speed. Up to 3 fields can be selected for a regular index.
- **Unique index:** An index that increases query speed and enforces unique values for 1 field.

@sdk_package_setup