Twitter, bowing to pressure from its users, said on Tuesday that it would more aggressively scrutinize fake or altered photos and videos.

Starting in March, the company said, it will add labels or take down tweets carrying manipulated images and videos. The move, while short of an outright ban, was announced one day after YouTube also said it planned to remove misleading election-related content on its site.

Twitter’s new policy highlights a balancing act — between allowing parody and removing disinformation — that social media companies face as they try to more aggressively police the content posted to their platforms.

To determine whether a tweet should be removed or labeled, Twitter said in a blog post, it will apply several tests: Is the media included with a tweet significantly altered or fabricated to mislead? Is it shared in a deceptive manner? In those cases, the tweet will probably get a label.