DOCS-11593: Basic Agent Usage page change (#30645)

* changes to the basic usage page.

* modified content

* vale edits and image added

Author: iadjivon

content/en/agent/basic_agent_usage/_index.md

@@ -23,7 +23,17 @@ further_reading:
 
 ## Managing the Agent
 
-You can manage your Agent installation using the Datadog Agent Manager GUI or from the command line.
+### Managing the Agent with Fleet Automation (recommended)
+[Fleet Automation][15] is the primary, in-app workflow for installing, upgrading, configuring, and troubleshooting the Datadog Agent at scale.
+
+{{< img src="/agent/basic_agent_usage/basic_agent_2_july_25.png" alt="The Fleet Automation view that allows you to centrally manage your Datadog Agents in one place." style="width:100%;">}}
+
+
+- **View configuration & history**: View every Agent in your fleet, its version, enabled products, configuration files, and historical changes from a single page.
+- **[Upgrade outdated Agents][13]**: Trigger remote upgrades for your Agents to keep your fleet updated in a few clicks.
+- **[Send a flare for support][14]**: From the Support tab of a host, generate a flare and attach it to an existing or new Support case without having to use the command line.
+- **Audit API-key usage**: Identify which Agents are using a specific API key and rotate keys safely.
+
 
 ### Datadog Agent Manager GUI
 
@@ -133,3 +143,7 @@ The results below are obtained from a collection of *110KB of logs per seconds*
 [10]: /agent/configuration/agent-configuration-files/#agent-main-configuration-file
 [11]: /getting_started/site/
 [12]: /agent/configuration/agent-log-files/
+[13]: /agent/fleet_automation/remote_management/#remotely-upgrade-your-agents
+[14]: /agent/troubleshooting/send_a_flare/?tab=agent#send-a-flare-from-the-datadog-site
+[15]: /agent/fleet_automation
+