Sarah Cardell, the Chief Executive of the CMA, said: “The changes we’ve secured from Google ensure robust processes are in place, so people can have confidence in reviews and make the best possible choices.”
The measures only relate to reviews for businesses when searching on Google or on Google maps.
They will not apply to reviews of products.
A spokesperson from Google told the BBC: “Our longstanding investments to combat fraudulent content help us block millions of fake reviews yearly – often before they ever get published.
“Our work with regulators around the world, including the CMA, is part of our ongoing efforts to fight fake content and bad actors.”