Update page content for clarity, concision, and flow

website/intro/index.html.markdown

@@ -3,19 +3,16 @@ layout: "intro"
 page_title: "Introduction"
 sidebar_current: "what"
 description: |-
-  This guide explains what Terraform is, what problems it can solve, and how it compares to existing software.
+  Learn what Terraform is, what problems it can solve, and how it compares to existing software.
 ---
 
 # Introduction to Terraform
 
 ## What is Terraform?
 
-Terraform is a tool for building, changing, and versioning infrastructure
+Terraform is an infrastructure as code (IaC) tool that allows you to build, change, and version infrastructure safely and efficiently. Terraform can manage both low-level components such as compute instances, storage, and networking, as well as high-level components such as DNS entries, SaaS features, etc.
-safely and efficiently. Terraform can manage both low-level components such as compute instances, storage, and networking, as well as high-level components such as DNS entries, SaaS features, etc.
 
-Terraform configuration files describe the components needed to run a single application or your entire datacenter. Terraform reads these configuration files, generates an execution plan describing what it will do to reach the desired state, and then executes that plan to build the described infrastructure. As the configuration changes, Terraform can determine what changed and implement changes in the right order to respect dependencies.
+Below, HashiCorp co-founder and CTO Armon Dadgar describes how Terraform can help solve common infrastructure challenges.
-
-Below, HashiCorp co-founder and CTO Armon Dadgar describes Terraform and its uses in more depth.
 
 <iframe src="https://www.youtube.com/embed/h970ZBgKINg" frameborder="0" allowfullscreen="true"  width="560" height="315" ></iframe>
 
@@ -25,26 +22,25 @@ Below, HashiCorp co-founder and CTO Armon Dadgar describes Terraform and its use
 
 ### Infrastructure as Code
 
-Infrastructure is described using a high-level [configuration language](/docs/language/index.html). This allows a blueprint of your datacenter to be versioned and treated as you would any other code. Additionally, infrastructure can be shared and re-used.
+Infrastructure is described using a high-level [configuration language](/docs/language/index.html) in human-readable, declarative configuration files. This allows you to create a blueprint that can be versioned, shared, and reused.
 
 ### Execution Plans
 
-Terraform generates an _execution plan_ and asks for your approval before creating or destroying infrastructure. This allows you to review changes  before they are applied.
+Terraform generates an _execution plan_ describing what it will do and asks for your approval before creating, updating, or destroying infrastructure. This allows you to review changes before they are applied.
 
 ### Resource Graph
 
-Terraform builds a graph of all your resources and parallelizes the creation
+Terraform builds a resource graph and parallelizes the creation and modification of any non-dependent resources. This allows Terraform to
-and modification of any non-dependent resources. This allows Terraform to
+build resources as efficiently as possible and gives operators greater insight into their infrastructure.
-build infrastructure as efficiently as possible and gives operators greater insight into their infrastructure.
 
 ### Change Automation
 
-Apply complex changesets to your infrastructure with minimal human interaction.
+Terraform can apply complex changesets to your infrastructure with minimal human interaction.
 
 
 
 ## Next Steps
 
 - Learn about common [Terraform use cases](/intro/use-cases.html).
-- Learn [how Terraform compares to other infrastructure tools](/intro/vs/index.html).
+- Learn [how Terraform compares to and complements other tools](/intro/vs/index.html).
-- Try the [Terraform: Get Started](https://learn.hashicorp.com/collections/terraform/aws-get-started) tutorials on HashiCorp Learn to learn how to use Terraform to manage real infrastructure.
+- Try the [Terraform: Get Started](https://learn.hashicorp.com/collections/terraform/aws-get-started) tutorials on HashiCorp Learn.