If you’re running a Facebook or Instagram campaign and need sophisticated targeting and budgeting options, which would be the best tool to use.

Ads Manager is the correct answer because it is Facebook's (and by extension, Instagram's) comprehensive platform for creating, managing, and analyzing ad campaigns. It offers advanced targeting capabilities, including custom audiences, lookalike audiences, and detailed demographic/interest targeting, along with sophisticated budgeting and bidding options necessary for optimizing campaign performance. The other options are incorrect: Ad Experience is not a recognized Facebook advertising tool. Ads Dashboard on your Business Page offers limited functionality compared to Ads Manager. Help Center is a resource for support, not an ad creation tool. Marketplace is a platform for buying and selling, not for managing ad campaigns.