What gets the most likes on social media site Facebook? Pictures of cute animals, of course. According to a new study of 3,000 images used in “Like Ads” on Facebook by 125 brands, those with images of animals had the highest response rate overall. Does that mean you should start working Grumpy Cat into your posts? Not necessarily, but it is advisable to use some kind of images in your Facebook ads and posts. Facebook research shows Like Ads that are text-only have the lowest interaction rate. In contrast, simply adding a logo, product shot or picture of people increases interaction with the ad.