What should you watch out for?

[Ehsanuls55]

Your evaluation must be very thorough and the first detail you should check is that your page is completely responsive. That is, that its format adjusts to any device, but, above all, to mobile devices:
Is it in the correct format?
Is the text easy to read?
Do videos load quickly or does the page slow down?
Can users submit forms easily as if they were on a desktop computer or is it very difficult for them?
Make sure your landing pages align with the campaigns you're using to send traffic to them. This means they should be a natural extension of the campaign that sent users there, so if you need to create more landing pages to accommodate other campaigns you're running simultaneously, feel free to do so.
Check the loading speed of your landing page. Common mistakes that cause pages to slow down include controlling directors email lists using long videos, uncompressed images, or using forms with complicated formats. As much as you might like them, doing this is a big risk because most users don't wait more than two seconds for the page to load! If this doesn't happen, they'll leave your page without even having seen it. Plus, more than half of users will leave if you ask them to wait three seconds or more... that's a lot to ask for for those who are used to the immediacy that the Internet offers!
Check the speed of a web page

To help you out, Google offers a great way to check your website's loading speed on different devices with its PageSpeed ​​Insight Tool . This tool will tell you what your average page load times are and offer suggestions for improving them.