Why are Responsive Search Ads valuable?

They limit a marketer’s opportunity to compete in additional auctions and match to additional queries.
They provide for a wider reach to potential customers by catering to different-sized devices.
They save time by allowing for the creation of a single ad with more than one headline and description asset.
They manually create customized combinations of headlines and assets to show to different users based on their review of existing data.

The correct answer is:

They save time by allowing for the creation of a single ad with more than one headline and description asset.