Homepage job
A homepage must serve multiple audiences and routes: products, support, company information, resources and more.
Landing page job
A landing page narrows the decision around one campaign goal. It can remove global navigation and unrelated paths when they weaken focus.
When a homepage is enough
For branded discovery or broad research intent, the homepage may be appropriate. For paid traffic or a specific lead magnet, a dedicated landing page usually gives you more control.
Decision rule
Use the page that best matches the visitor's intent. Do not force every visitor into a landing page just because focused pages can convert well.