Why is Search Engine resubmission is important?
Over time your positions will change as new pages get submitted and inevitably, some will get ranked higher than yours. Search engine companies will also change their ranking programs from time to time, and drop unpopular pages in order to deliver the most up-to-date content they can to their audience. Search Engine resubmission will keep your pages in front of the search engines through periodic submissions and allows to keep your site updated to the latest industry guidelines. Resubmission also allows you to revise or add keywords, as your business needs change.
