Grammatical Errors Corrected (#570)

Summary:
Grammatical Errors Corrected

Pull Request resolved: #570

Reviewed By: mengxuanzhangz

Differential Revision: D44983989

Pulled By: stcheng

fbshipit-source-id: a317f5be87880e01f9e5b2714f2d402bb8d9ba18

README.md

@@ -6,13 +6,13 @@
 
 ### Introduction
 
-The Facebook <a href="https://developers.facebook.com/docs/business-sdk" target="_blank">Business SDK</a> is a one-stop shop to help our partners better serve their businesses. Partners are using multiple Facebook API's to serve the needs of their clients. Adopting all these API's and keeping them up to date across the various platforms can be time consuming and ultimately prohibitive. For this reason Facebook has developed the Business SDK bundling many of its APIs into one SDK to ease implementation and upkeep. The Business SDK is an upgraded version of the Marketing API SDK that includes the Marketing API as well as many Facebook APIs from different platforms such as Pages, Business Manager, Instagram, etc.
+The Facebook <a href="https://developers.facebook.com/docs/business-sdk" target="_blank">Business SDK</a> is a one-stop-shop to help our partners better serve their businesses. Partners are using multiple Facebook API's to serve the needs of their clients. Adopting all these API's and keeping them up to date across the various platforms can be time consuming and ultimately prohibitive. For this reason Facebook has developed the Business SDK bundling many of its APIs into one SDK to ease implementation and upkeep. The Business SDK is an upgraded version of the Marketing API SDK that includes the Marketing API as well as many Facebook APIs from different platforms such as Pages, Business Manager, Instagram, etc.
 
 ## Quick Start
 
 Business SDK <a href="https://developers.facebook.com/docs/business-sdk/getting-started" target="_blank">Getting Started Guide</a>
 
-Python is currently the most popular language for our third party developers. `facebook_business` is a Python package that provides an interface between your Python application and <a href="https://developers.facebook.com/docs/business-sdk/reference" target="_blank">Facebook's APIs within the Business SDK</a>. This tutorial covers the basic knowledge needed to use the SDK and provide some exercises for the reader.
+Python is currently the most popular language for our third-party developers. `facebook_business` is a Python package that provides an interface between your Python application and <a href="https://developers.facebook.com/docs/business-sdk/reference" target="_blank">Facebook's APIs within the Business SDK</a>. This tutorial covers the basic knowledge needed to use the SDK and provides some exercises for the reader.
 
 **NOTE**: ``facebook_business`` package is compatible with Python 2 and 3!
 
@@ -38,7 +38,7 @@ access to Facebook APIs.
 
 An access token is an opaque string that identifies a User, app, or Page.
 
-For example, to access the Marketing API, you need to generate a User access token
+For example, to access the Marketing API, you need to generate a user access token
 for your app and ask for the ``ads_management`` permission; to access Pages API,
 you need to generate a Page access token for your app and ask for the ``manage_page`` permission.