Firstly, you need to opt for a text ad but can also create a PPC ad that is banner, video, or product listing. When getting started use the design guideline mentioned below:
Headline : Keep it short and attention grabbing.
Display URL : This is the link that displays with the ad and clues customers on the company that is hosting the ad. So, keep your URL short and crisp.
Destination URL : This is the link that customers will be redirected to if they click on the ad.
Description : You will need to describe your product or service in a few words to attract customers to click on your ad.
There are length restrictions in each of them, so make sure to follow them and use them accordingly.