If you want to read and write data on Facebook’s platform, then you have to use the Graph API. Because it is HTTP-based, you can use it to query data, post stories, manage ads, upload photos, and perform a multitude of other tasks. Creative developing will help you plan the best use of the API calls you make.
The Graph API V3.3 The premier method of reading and writing to the Facebook social graph for apps is the Graph API. If you want to know how to interact with all of Facebook’s SDKs and products, or use other APIs which are extensions of the Graph API, then you have understand the Graph API.