Facebook's Instagram will change the way users post advertisements as part of a wider probe by the UK competition watchdog to combat misleading online ads. Facebook has committed to this “important behaviour shift” following an investigation by the Competition and Markets Authority, the regulator said in a statement Friday. The changes will make it “much harder” for users to post ads without labelling them as such. Instagram promised to prompt users “to confirm if they have been incentivised in any way to promote a product or service and, if so, require them to disclose this fact clearly,” the CMA said. Instagram has previously faced criticism by the US Federal Trade Commission over a lack of transparency in posts by users and whether they’re being paid by a company to push a product. The move also comes as Facebook has been scrambling in recent years to contain blowback from findings that Russians and others used the platform to meddle in elections in the US, Europe and elsewhere. The CMA opened its investigation in 2018, seeking to have adverts clearly labeled to avoid people being misled. A group of British celebrities, such as Ellie Goulding and models including Rosie Huntington-Whiteley and Alexa Chung, agreed last year to tell shoppers upfront if they are being paid for social media posts. Failing to label posts properly may lead followers to believe that an endorsement is a star’s own view and to trust a product recommended by someone they admire, the CMA has said previously. “We’re pleased to be working with the CMA on our continued efforts to help people be transparent about when they are paid to post content on Instagram,” Facebook said in an emailed statement. Instagram will have to regularly update the CMA on its progress. The regulator said it will continue to investigate the practices of other social media platforms and push for changes where needed. The changes will affect users in the UK and anyone directing posts toward Instagram users in the country. The regulator said it will continue to investigate the practices of other social media platforms and push for changes where needed.