
The search giant Google has announced updates to its AdWords Dynamic Search Ads (DSA) on March 28th, 2017, including supports for expanded text ads.
The first update Google introduced, was a solution for DSAs called page feeds. Designed to give advertisers better control over which URLs to associate with DSA campaign, it consists: Page URL and Custom Label. With the update, advertisers can choose whether to trigger DSAs on certain landing pages.
They can also select "Use URLs from my page feed only" in the campaign settings.
When advertisers want to get their new products to be promoted quickly in addition to other products, they can include the product pages' URLs in the page feed provided, and select the option to "Use URLs from both Google’s index of my website and my page feed" in campaign settings.
Custom labels can be used to group products around promotions, stock availability, ratings and more. With this feature, advertisers are allowed to add several custom labels.
And after uploading a page feed, advertisers can then add the feed to relevant DSA campaign in settings. The custom labels are applied fro the Auto targets tab. Advertisers can also add a new Dynamic ad target and enter the custom label. Modifiers can be applied to custom labels.

Dynamic Search Ads are one of the easiest way for advertisers to find customers on Google by offering exactly what they want. The program is known to help well-developed websites and businesses by targeting their ads and fill in the gaps between their keywords-based campaigns.
Websites targeting many keywords can miss relevant searches, and this is where DSA complement AdWords by speeding the process up.
According to Google:
Using DSA, advertisers can have their website's headlines to be dynamically added to be of greater relevance for what people on Google have searched for. This way, advertisers can quickly get more potential customers to their website.
Advertisers have the control of their campaign, including the display URL and also the source of their site-based targeting.