The left settings block, which lets you configure it by choosing sites, the price type, entering the minimum and maximum price for an item and its quantity. Read more here.
The upper settings block, where you can choose various item filters, as well as set a blacklist, enable notifications or refresh the table. Read more here.
The items table, where you can add an item to favorites, study the item's pricing in more detail, open the item page on the site or add the item to favorites. Read more here.