Google reviews take the lion's share at 73%. Yelp, although at 6%, is next and Facebook last at 3%. Together they account for most of the reviews adding up to a whopping 81%, The other sites all combined make up the remaining 19%. That will be your medical review sites, dental review sites, your AVVO, and other trade specific medical, dental, and profession specific sites. So, whether you've been in practice for years, or just starting out, focus your efforts on Google reviews, and on how to get Google business reviews. Later we can talk about how to get reviews on Yelp and other sites.