A mobile page needs a connection test
A phone user who clicks your ad may reach a page built for a wide desktop screen. For example, an enrolment form can push the submit button off screen or hide the course price below a large image. The person has shown interest in your ad, but the page makes the next step difficult.
You can test the destination on a phone using a slower connection before choosing mobile targeting. A large video at the top of the page may delay the headline even when the rest of the offer is clear. It helps to check the form, payment options and page language on the same device because each can affect whether someone continues.
Your page can show the headline, price and next step before loading heavy media below them. This gives people useful information sooner and makes the page easier to use. You can compare the purchases or enquiries you measure from mobile and desktop campaigns to see which page needs attention. Mobile advertising lets you focus the campaign on the device experience you have tested.