What is Zoho Marketplace?
Zoho Marketplace is an online store where users can find and install extensions that enhance the core functionality of Zoho products. Extensions provide feature enhancements, integrations with third-party software, and many other solutions for common business needs.
In simpler words, Zoho Marketplace is a platform like the Google Playstore where developers can upload their Apps and Extensions and the clients can install it for their organization to enhance their work and to increase productivity.
You can integrate extensions in your Cliq account from here https://marketplace.zoho.com/cliq