I'm new to all of this, i want to focus on CPA marketing and i've watched a couple of video on youtube about it. What i don't understand is why i need to create a landing page when the campaign that i chose to promote already have one? I've understand that is better to have a landing page to collect emails and Facebook doesn't accept campaign landing page for ads, but still the point isn't to convert and from my opinion it's better to just stick it to one landing page , than to put the client to go to unnecessary steps .