It might be the defining feature of politics in the social media age. So how can you pop your own "filter bubble"?

Video journalist: Natalia Zuo, Written by: Mike Wendling

Read more from BBC Trending's special election series, Filter Bubbles of Britain:

DIY campaign ads: Meet the 'micro-Pacs'

Inside the Corbynista Facebook 'army'

What pro-Tory Facebook really wants

Online Remainers: Can't agree who to vote for

The rise of Tory attack ads on Facebook

You can follow BBC Trending on Twitter @BBCtrending, and find us on Facebook. All our stories are at bbc.com/trending.