SEO is often like website development. In Development, as years pass, you keep adding pages, features, and content. It all works, but you find that it starts to get a bit bloated and disorganized. Every few years, it’s a good idea to take all the improvements you’ve tacked on and rebuild them into the core of a new site.
In SEO optimization, the same thing happens. We find pages to optimize for certain keywords, add other optimized content, and so on. Over time, we find we made the best keyword/page decisions at the time, but those decisions may no longer make sense today. New content was created that is a much better topical fit for certain keywords and pages that were optimized for relevant keywords are no longer relevant pages.
SEO creep happens. But, there are things you can do to minimize it so that the dreaded site rebuild doesn’t have to happen more than once every few years . . . which is just about time when a site re-design is due anyway.
Read more: SEO Optimization: How to Avoid Nasty SEO Creep After 10 Years of Optimization