Functional stability in any web design means keeping the interactive elements of the site working reliably. Functional stability has two components: getting things right the first time as you design the site, and then keeping things functioning smoothly over time. Good web sites are inherently interactive, with lots of links to local pages within the site as well as links to other sites on the web. As you create your design you will need to check frequently that all of your links work properly. Information changes quickly on the web, both in your site and in everyone else’s. After the site is established you will need to check that your links are still working properly and that the content they supply remains relevant.