SEO URL Keyword History Redirection
Make sure your old SEO URL's do not produce a 404 Not Found but a nice 301 redirect to the new SEO URL.
No need for difficult htaccess redirection rules.
Fully automated, turn-key, fire and forget.
Normally when you change your SEO URL keywords, the old ones are gone.
If those old SEO URL's are already indexed by search engines, they will receive a 404 Not Found response.
That is a shame and not good for your ranking.
With SEO URL Keyword History Redirection, whenever you change your SEO URL Keywords, the old keywords are automatically saved in your SEO URL Keyword History.
When the search engines request the old SEO URL, they are automatically redirected to the current SEO URL with a permanent 301 redirect.
The same of course applies to any customer who happens to click on an obsolete SEO URL anywhere on the internet.