In order to appeal to customers on mobile devices, it’s important to:
- A) Send users to a video-based landing page
- B) Send users to a mobile-friendly landing page
- C) Avoid using ad extensions
- D) include your phone number as your display URL
Explanation: People seeing your ads on mobile are more likely to want to know where you are, or to call you. Show your location and phone number with location extensions and call extensions. Also, consider creating ads devoted to people on mobile devices, using the mobile version of your website as a landing page, and offering specials suited to a mobile audience. Keep in mind, your text ads can appear differently on mobile.
Read more here: https://support.google.com/adwords/answer/1704392?hl=en