Microsoft Bing posted a new blog post saying "for XML sitemaps, one of the most critical tags you can include in your sitemap is the "lastmod" tag." And it will become even more critical as Bing is ...
Microsoft Bing will soon rely a lot more on the date you specify in the lastmod field within your XML sitemap for crawling. Fabrice Canel, Principal Product Manager at Microsoft Bing said that ...