There are many reasons someone may consider archiving a domain/website, such as the site is very old and will likely not be available any more.
Maybe you're like me, and have Dial-up at home that you never have access to, but do have access to the internet at another location
But you want to see these sites without being connected
Step 1: Download the Proper Software
It's an efficient domain archiving tool that edits the webpages to be interlinked, rather than using links to the internet
You can download HTTRack here