"SEO Settings" contains such fields as "Meta Keywords" and "Meta Description", which improve overall SEO of your product. Each product in Store Product Catalog has such settings.
The description of all features is as follows:
"Meta Title" - this title will appear in the browser's tab.
"Meta Description" - field must contain short information about your page, so it would be easier to find this page in search results.
"Meta Keywords" - field must contain a number of keywords, which represent the main idea of the page. It’s used for search engines, so it would be easier to find this page in search results.
"No-Index" - if enabled, this feature won’t allow search engine to index page.
"No-Follow" - if enabled, this feature won’t allow search engine to index page, however all external URL’s from the following page would be active.
If both options were enabled - search engine won’t index page and external URL’s from the page would be disabled.
"Hide Canonical" - if enabled, attribute rel="canonical" will be removed from the current post.
"Canonical URL" - this field contains the URL that this page points to with rel="canonical". Cross domain canonical is supported too.
Also there are available such SEO settings as "Meta Keywords" and "Meta Description" to improve the position of your products in search results. These settings are available for each Store Product Category.