In addition the all these factors, you should pay attention to another technical requirement. Responsiveness of your website is one of these factors. In short, mobile responsiveness is the compatibility of your website to more than one platform. Therefore, your landing page shouldn’t have any problems when displayed on different devices.
Nowadays, mobile usage of customers is more than %50 for almost every sector. Because of that, your landing page theme should have successful user experience, both on desktop and on mobile devices.