A recent investigation by the Times showed that UK advertisements, from the likes of Sainsbury's, RBS and the UK government, have been posted on YouTube videos uploaded by extremists, as well as on websites belonging to terrorist groups.
Now, M&S has followed suit, and said in a statement:
In order to ensure brand safety, we are pausing activity across Google platforms whilst the matter is worked through.
Jamie Gavin, MD of an independent media company told the BBC's Wake up to Money: "Brands do have to take a bit of responsibility themselves."
A spokesperson from Google said last week that the firm is "committed to doing better".
And indeed, many brands are taking things into their own hands and cutting ties with Google. Big names that have removed their adverts include: