To see your site search, head over to yourdomain.mavenseed.com/search You can use this URL in your navigation as well!
Each Maven site comes equipped with a global site search that will search your content based off of it's Title, Excerpt, Category and Tags.
The search can be accessed by visiting your Mavenseed domain http://yourdomain.mavenseed.com/search
Here your member can search your content by the Custom categories you've set up, and types of content on Mavenseed.
Pro Tip: If you'd like to have your search accessible, visit your menu link settings in admin and add the search to your main site navigation.