According to android center it has been announced that the chrome is going to begin pushing ads by default from 1st of September 2015. This change is going to be made for overall performance by the users.
The following change is going to be implementing soon which means that the ads will be play auto on the web pages in chrome browser. The flash ads will be blocked to auto play, the following update will be helpful in reducing power consumption, helps you to search web longer and hunt for a power outlet.
Majority of the flash ads are uploaded to the adword and are automatically converted to the HTML 5, but now the advertisers have to make sure by implementing the changes.
The changes are going to roll out in the start of September 2015 which shows a good step forward for the users.
Learn here: how to disable flash ads in chrome