Updated the Beginners Section of Terraform

Answered the definition questions for provider, resources and provisioner and those of terraform commands.

README.md

@@ -1609,9 +1609,11 @@ The benefits of Terraform over the other tools:
 <details>
 <summary>Explain each of the following:
 
-  * Provider
-  * Resource
-  * Provisioner
+  * Provider: is any cloud based technology - github, aws, postgresql etc - which one can make an API call to with its unique terraform 
+  	      provider binary to provision available services and components.
+  * Resource: resources are the services and components you provision on these platforms.
+  * Provisioner: Provisioner in terraform's lingo specifically refers to configuration tools like ansible or salt-stack which are used 
+  		 in combination with terraform to orchestrate a system e.g vm's 
 </b></details>
 
 <details>
@@ -1623,10 +1625,12 @@ It keeps track of the IDs of created resources so that Terraform knows what it i
 <details>
 <summary>Explain what the following commands do:
 
-  * <code>terraform init</code>
-  * <code>terraform plan</code>
-  * <code>terraform validate</code>
-  * <code>terraform apply</code>
+  * <code>terraform init</code> initialises and downloads the provider's binary as described in the .tf files
+  * <code>terraform plan</code>	is a dry-run listing the services and components that will be provisioned on specified provider's 
+  				platform.
+  * <code>terraform validate</code> parses through the terraform code to ensure that they are both syntactically correct and runtime 
+  				    error free.
+  * <code>terraform apply</code> this command provision's the described services on the providers platform.
 </summary><br><b>
 
 <code>terraform init</code> scans your code to figure which providers are you using and download them.