The table shows the list of Maven repositories, encountered in the current project, with their URLs, type (local or remote) and the date of the most recent update.
Indexed Maven Repositories
This area contains a list of Maven local repositories that are configured in the pom.xml file. The list is updated automatically.
Click this button to update indices of the selected repository. It might be helpful in case you expect to get information for newly deployed artifacts such as new versions of libraries that you use in the project. Also when you use maven dependencies completion in pom.xml or generation of maven dependencies using Maven Artifact Search dialog.