Although it is not the most attractive format for the Display Network (considering it offers videos, graphics, and rich media), a significant part of the work in building a campaign for the Display Network involves creating good text ads for the Display Network.
To write good Sponsored Links for the Display Network, you should remember that:
The Display Network is channel-oriented and not keyword-oriented, so the user is there for the content; the more related the sponsored link is to the content, the higher the chances of getting a click from that user.
The Display Network has a lower expected conversion rate than search, as the user is not trying to find an answer to a question but is interacting with the content.
The Display Network has a Remarketing strategy, which can greatly help you capture those leads that were not captured in the first interaction with your site. Use promotions, discount coupons, and advantages to convert even more.
See this example of sponsored links in the Display Network:
Example of Sponsored Links in the Display Network