Most SaaS sites send paid clicks to a homepage that tries to speak to every persona at once: the founder, the team lead, the procurement reviewer, the engineer checking the API docs. A visitor who searched for a narrow problem sees a broad platform pitch, scans the navigation for a minute and leaves. The ad did its part; the destination did not.
The job a landing page actually does
A focused page removes the navigation, restates the problem in the searcher's own vocabulary, shows the product doing that one thing and offers a single next step. For a self-serve tool that step is usually a trial or freemium signup. For a product sold to larger accounts it is a demo request routed straight to the right sales rep. Mixing both on one page splits attention and muddies your reporting.
Where the words come from
Strong copy for software buyers borrows phrases from support tickets, sales call notes, onboarding surveys and search term reports. Those sources tell you whether people say "workflow automation" or "stop copying data between tools", and the page should mirror whichever version your buyers use.