The Nexus Outreach Plugin is installed and enabled by default in Nexus OSS and Nexus Pro. It allocates space underneath the search feature on the Welcome tab for linking to further documentation and support resources. This data is retrieved from Sonatype servers.
In a case where this outgoing traffic from your Nexus instance or the resulting documentation and links are not desired, the plugin can be disabled. The plugin can be disabled in the settings for the Outreach:Management capability as documented in Section 6.6, “Accessing and Configuring Capabilities”.
You can safely remove the plugin as well without any other negative side effects. To do so, simply remove the nexus-outreach-plugin-X.Y.Z folder in $NEXUS_HOME/nexus/WEB-INF/plugin-repository/ and restart your Nexus instance.