Google recently implemented a policy banning any publication of porn ads that promote sexual content including masturbation and hardcore pornography.

The changes which is effective, prevents advertising that features "graphic sexual acts with intent to arouse including sex acts such as masturbation."

According to CNBC, Google gave out a notice that it would implement restrictions on its AdWords service in March so that advertisers are provided time to research for other avenues.

The search giant informed companies of the change in policy through an email which was sent out in the month of June. The email reads:

"When we make this change, Google will disapprove all ads and sites that are identified as being in violation of our revised policy. Our system identified your account as potentially affected by this policy change. We ask that you make any necessary changes to your ads and sites to comply so that your campaigns can continue to run."

AdWords is a platform where advertisers place their ads on Google sites as well as other properties across the Web. The CNet reports that advertising is a big thing now, Google has managed to make $13.8 billion in ad revenue which is almost 90 per cent of the company's total revenue.

Google did not state the percentage of sexually explicit Web sites that used to advertise in AdWords. However, when asked for the reason for such a change, a Google spokesperson said the company updates its policies on a regular basis. Also, the company has had strict guidelines when it comes to sexually explicit content, according to the spokesperson.

There are some in the porn industry who are unhappy with the announcement. For instance, Theo Sapoutzis, chairman and CEO of AVN Media Network says, "It's something that's been [untouched] for 12 years, so you don't expect change is going to start happening."

But the change in Google AdWords policies is nothing new, as the company has earlier banned pornography on Google Glass. AdWords has also regulated Google Play store and all apps containing promotion of pornography were banned.

According to CNET, the change took place as Google invests in other forms of advertising such as online video. Google acquired mDialog, a company specialising in video advertising technology. mDialog works with large media companies and manages and delivers video advertising across screens including Androind-running devices and Apple's iPhones and iPads.