A list of pages on a website that search engines should index. Written in extensible markup language (XML), both humans and computers can understand a sitemap XML. In addition to page URLs, they include modification dates so search engines can tell whether or not a page has been crawled since it was updated. Sitemap XML- and robots.txt-related search engine optimization (SEO) tactics approach indexing from different sides of the same coin. Sitemap XML says “yes” while robots.txt says “no.”

Combining Email Marketing with Other Types of Marketing
Whether you choose to do your marketing online or offline, one thing does not change. This is the concept that no single marketing strategy will be as effective as a combination of two or more marketing strategies.