Search Page allows you to quickly locate a page in your sitemap. You can also find a group of pages and perform bulk updates.
Advanced search allows you to further filter your query. Click the Add button in the upper right to add an additional filter. You can stack up many filters.
A drop down (shown) displays the filter types available to you. Each of these filter types might have its own options that are displayed once you pick it. As you add Custom Attributes to your pages, they may be available here as well.
Note: Use the Approved Version filter to make a quick workflow report showing which pages have pending changes that need to be approved.