An attribute is a piece of information given to an item that provides information about your products to Priceshape.
All HTML feeds can have attributes
Attributes provide information about your product
Attributes usually come in name/value pairs like attributename="value"
For example, an attribute can be like this in the feed:
<gtin><![CDATA[ 5709513142522 ]]></gtin>
In this case, the <gtin></gtin> is the attribute, and " 5709513142522" is the value of the attribute for the product/item in the feed.