Dynamic search ads are search ads that can automatically serve ads when keywords related to the page contained in the specified URL are searched.
If you specify a URL, the search engine will automatically load the information in the specified URL, so when a user searches for a keyword that is highly relevant to the page, it will be possible to automatically deliver the advertisement. ..
With dynamic search ads, you can expect to get clicks and conversions from a wider range of keywords by complementing search ads that specify keywords.
For details, please refer to the link below.