Gatsby is a React-based static-site generator that has overhauled how websites and blogs are created. It supports the use of plugins to create custom functionality that is not available in the standard installation. In this post, I will introduce Gatsby plugins, discuss the types of Gatsby plugins that exist, differentiate between the forms of Gatsby plugins, and, finally, create a comment plugin that can be used on any Gatsby website, one of which we will install by the end of the tutorial.

https://www.smashingmagazine.com/2020/07/understanding-plugin-development-gatsby/