To appreciate the effects of the applied CSS, it is worth copying this template verbatim at
this stage, as that’ll help you understand the examples discussed. Note that the list of links will tie together further templates in this section, giving you a cut-out-and-keep mini-site for reference.
It means the mini-site is one that you can cut out and then keep. As opposed to looking it up all the time, you could simply pin this up on the wall by your computer so you always have the template handy.
I would assume this is a template that comes on paper, or at least something that is printed.
It's a rather dated usage, more popular a century ago than today. The reference is to cutting out (perhaps only part of) a page from a magazine/newspaper (daily/weekly/monthly publications which would normally be thrown away after being read).
Obviously nothing physical needs to be kept in OP's context - it's just a figurative extension. The idea is that you'll put the list into a section within your browser's bookmarks/favorites.