Dynamic search ads would be most helpful for…
websites with hundreds or thousands of products, services, or listings that change frequently
Moving an ads position dynamically in whatever direction a users eyes are looking.
campaigns that need to reduce exposure on competitive keywords.
a local restaurant with a dynamically changing menu that offers fresh new entrees every few months.
Explanation: Businesses with websites that contain a lot of content or well-structured URLs will see the best results from using Dynamic Search Ads. Here are some additional examples of the types of businesses that are a good fit for using this campaign type:
- Your website features different products or
- You sell seasonal product lines or other offerings, or you’re expanding your business to new
Read more here: https://support.google.com/adwords/answer/2471185?hl=en