Selecting a category in the dropdown will make the campaign target sites as they are categorized by BidTheatre.
Selecting a market category will filter sites based on the category signal provided by the seller.
Require Matched User: Will only target users that have been synced with the seller, and by that supports cookies.
Disable Flood Protection: Will potentially bid to buy several ad slots in the same pageview for the same advertiser for the same user.
Bid Optimization: Will apply automatic optimization of bid levels. Read more about bid optimizaiton here.