United Kingdom, April 16 -- Google is expanding its "spam policies" in a bid to address "back button hijacking".

The technology giant - which is behind the Chrome browser - is trying to crack down on the "deceptive practice", which occurs when a website prevents a user from returning to the previous page they just came from, after the user has clicked the back button on their browser.

Instead, some are directed to websites they haven't previously visited, or they are "presented with unsolicited recommendations or ads", according to Google.

But in a new blog post, titled Introducing a new spam policy for "back button hijacking", Google said: "We are expanding our spam policies to address a deceptive practice known as "back button hijack...