> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vindicia.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Retain Feature Implementation Guide Introduction

Vindicia Retain is a SaaS-based customer retention solution designed to help businesses deliver a frictionless retention experience for their unique customers. Retaining each end user with clarity, intention, and focus, Vindicia Retain enables businesses to maintain connections in a highly competitive marketplace.

## About This Guide

The Retain Implementation Guide provides information on how to implement certain features in Retain. It is written primarily for technical audiences and administrators.

It provides information on:

* [Push Notifications](ProgGuide_PushNotifications)
* [External User Authentication in Vindicia](externalUserAuthenticationAbout)


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.