The changes will take place in October and advertisers will need to be certified with Google for the country where the ads will appear, the search engine giant said in a blog https://support.google.com/adspolicy/answer/9142422 post.

The company said in March it would ban advertisements for cryptocurrencies and initial coin offerings, starting June.

Google's action follows a similar move by Facebook Inc. The social media giant has allowed certain ads promoting cryptocurrency and related content from pre-approved advertisers, while banning those tied to binary options and initial coin offerings.

Google's move to ban such ads in March had sent the price of the best-known cryptocurrency, bitcoin , down more than 10 percent.

(Reporting by Sonam Rai in Bengaluru; editing by Patrick Graham and Sriraj Kalluvila)