A top navigation layout places the main links across the upper part of a website. It is like the signboard at the entrance of a building, showing the main destinations before someone walks in.
This pattern works well when a site has a small number of important sections. Visitors can scan the choices and move directly to the page they need.
If there are many sections, links may become crowded on a phone. Keep the main choices focused and provide a clear menu for smaller screens rather than shrinking everything until it is hard to use.