Website using the € symbol on their website - meaning it may accept payment in Euros.
Website using the £ symbol on their website - meaning it may accept payment in this British currency.
Google+ platform websites integration using the Google+ platform tag.
Let visitors recommend your content on Google Search and share it on Google+.
Open graph description entity tag
Any offered product or service. For example: a pair of shoes; a concert ticket; the rental of a car; a haircut; or an episode of a TV show streamed online.