Here is something scary to think about: the quality and content of your landing page is responsible for 50% of the results you'll see on your ad campaign. Furthermore, the quality of your landing page is mostly determined by what is "above the fold" meaning, what is seen on a mobile or desktop PC when the page loads, before you scroll down at all.
This means even if your ad campaign is built absolutely perfectly, a poor landing page will never give it a chance to shine. Sad. The truth is many of our providers' websites were not built to be lead generating machines, and using a provider website for a landing page is generally a poor idea. We solve this problem by bringing our own high-performance, conversion-optimized, A/B tested pages and link them to the provider domain (not a third party!) so the user has a seamless experience with your brand.