Update README from edits

README.md

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-This guide walks you through the process of building a simple web application with [Spring Boot][spring-boot].
+This guide provides a sampling of how [Spring Boot][spring-boot] helps you accelerate and facilitate application development. As you read more Spring Getting Started guides, you will see more use cases for Spring Boot.
 
 What you'll build
 -----------------
-
-The guide provides a sampling of how Spring Boot helps you accelerate and facilitate app development. As you read more Spring getting started guides, you will see more use cases for Spring Boot.
+You'll build a simple web application with Spring Boot and add some useful services to it.
 
 What you'll need
 ----------------