If that sounds familiar, it's because that's how Facebook decides what to show users of its online social network.
Facebook Inc., which owns Instagram, has long used a complex formula to emphasize items it hopes will be "relevant" to each user, based on factors such as whether the post came from a close friend and how the user responded to similar posts.
Instagram has long acted more like rival Twitter, showing every post in reverse-chronological order. But as its audience has grown to more than 400 million users, Instagram says it's become harder for users to keep up with the gusher of photos and videos posted by the accounts they follow.
"This means you often don't see the posts you might care about the most," the service said in a message to users Tuesday. Instagram plans to introduce the new formula gradually, giving weight to the kind of factors Facebook considers in its news feed. The service says users will still be able to find all the posts they used to see, although they won't be in the same order.
That gradual introduction seems intended to avert any potential backlash from users who don't like the new system. Facebook annoyed some early users when it changed from reverse-chronological ordering to its current formula several years ago. Twitter has also run into user complaints whenever it hints at changing its approach.
The change comes as Instagram is also showing more commercial messages. Although the new formula doesn't affect advertising, Instagram needs to keep users engaged and interested if it wants to maintain its audience for paid posts.