Browsing the Internet is often much like looking for a cottage in an unfamiliar part of the country, where there are endless lanes and few signposts. You might get to a good starting point you recognise and then branch off in a particular direction which turns out to be a rather blind alley. So you want to go back and start again.
Traditionally, in browsers you might add the sensible starting points to your favourites. But the problem with this is you then end up with endless lists of favourites which almost need a search engine to make sense of them.