Hello dear,
Is google rating stars effects keywords ranking, when your votes are less than 100.? After adding rating stars on site my website keywords ranking decrease. any suggestion?
Are you talking about the 5 star ratings on Google My Business?
If so, then yes they do matter, but mostly just ranking in the 3-pack, also known as the map pack. I don't think it has much of an impact on organic rankings. Not sure what you are referring to re 100 votes, but Google certainly does not need 100 reviews to give you a boost. most businesses don't have that many reviews, except maybe restaurants or cafes.