With SiteArchive, you have access to all previous versions of your website, from the first archive to the latest.
This means that in a few clicks, and from the same hub, you have easy access to make comparisons between past and present versions of a site.
If it turns out that changes you made to the website did not have the effect that you anticipated and a previous version in fact produced better traffic patterns, you can use SiteArchive as reference to see how you used to do it.