"Changes" is a tool you can use to identify, and display, changes in the content of archives of URLs. First you can select two different archives for a URL, based on an interface that shows the degree of relative change from one archive to another. Then you can see the replay of the two URLs you select, side-by-side, with changes highlighted in Blue and Yellow.
The Wayback Machine is an initiative of the Internet Archive, a 501(c)(3) non-profit, building a digital library of Internet sites and other cultural artifacts in digital form. Other projects include Open Library & archive-it.org.
Your use of the Wayback Machine is subject to the Internet Archive's Terms of Use.