Hello Is it necessary to doing sitemaps for old sites (MSN BL- 1200) or only for youngs? Thanks for all replies. Regards
If you want your older site to be get crawled properly then you can use sitemap otherwise not. Google loves older sites so, as far the question of crawling is there then your site must have been crawled many a times before, but suppose recently you have added many new pages and content then having a updated sitemap would be helpful.
If all pages of your old site are indexed, then there is no need to that. Sitemap is useful for new and not indexed sites.