Enhance documentation for Remote.It: update descriptions and improve image alt text for clarity

Author: madeline-underwood

content/learning-paths/cross-platform/remoteit/_index.md

@@ -3,6 +3,8 @@ title: Access remote devices with Remote.It
 
 minutes_to_complete: 45
 
+description: Learn how to install and configure Remote.It for secure remote device access using SSH and other services, with proxy and peer-to-peer connection options.
+
 who_is_this_for: This is an introductory topic for software developers who want to use Remote.It to establish private network connections between users and devices or devices to device.
 
 learning_objectives:

content/learning-paths/cross-platform/remoteit/cli.md

@@ -62,7 +62,7 @@ You can view the connection information by running the status command
 sudo remoteit status
 ```
 
-## Additional CLI Usage
+## Additional CLI usage
 
 The CLI provides commands such as to register this device as a target for connections.
 

content/learning-paths/cross-platform/remoteit/connections.md

@@ -18,9 +18,9 @@ The advantages are:
 
 Peer to Peer connections are created by installing a software package with initiator support on the initiator device. Install the Remote.It Desktop application or Remote.It CLI on your initiator device to support Peer to Peer connection.
 
-![example image alt-text#center](remote.it-connections.png "Proxy and Peer to Peer Connection Illustration")
+![Diagram illustrating the difference between proxy connections, where traffic is routed through a Remote.It server between initiator and target devices, and peer-to-peer connections, where a direct connection is established between initiator and target without an intermediary server#center](remote.it-connections.png "Proxy and peer-to-peer connection architecture")
 
-## Peer to Peer Connections
+## Peer to peer connections
 
 Peer to Peer connections to the target computer appear as a local port on the initiator computer.