Optimized tags Your online store will contain tags, working with which properly is very important for visibility in search engines (<title>, <h1>, alt for images, <meta> -tags)
XML and HTML site map By default your online store will contain a site map: a presence of an XML site map is very important for promotion in search engines.
Categories as ‘breadcrumbs’ Displaying categories with links to parent categories increases the speed of the website indexing and its visibility for search engines.
Friendly Content and Product URL Your online store page addresses have human readable format, for example: http://www.mysite.com/categories/decoration