DSA Campaigns are used as learning experiments - You may choose to build dynamic search ad campaigns because they help you learn what ad copy & keywords to use in the other campaigns, in case you missed any important and effective words. Adding new words to the other campaigns can be helpful to optimize -- and it can be especially helpful if you’re hitting a spend ceiling and would like to raise the budget. It’s a way to identify, rather than guess, which keywords to target.
When to use - These campaigns are 100% created by the algorithm based on the words used in the landing page -- the algorithm decides what ad text and what keywords to use. These are only good for websites that are extremely specific and have content centered on a set of keywords.
How to use - Give the campaign a small budget. These campaigns have the ability to spend a lot of money very quickly, and DSA campaigns usually have a lower conversion rate than other types of campaigns, so it’s okay to let it be in the “limited by budget” status.
Optimize - When you’re ready to see it’s results, go to the DSA campaign and click on Search Terms. Sort by impressions to see which terms have a high amount of search volume. From there, find the ones that are actually getting clicks. Use those terms in the other campaigns.