In svelte-routing there is the Link component (with an uppercase "L") and link as an action. From the description:
Link:
A component used to navigate around the application.
link
An action used on anchor tags to navigate around the application. You can add an attribute replace to replace the current entry in the history stack instead of adding a new one.
Despite the description I don't understand the difference, i.e. when would I use which one? Both ways seem to do the trick in letting me navigate within my application.