Instagram Provides New Overview of How its Reels Algorithm Works
First off, Instagram highlights how it determines which Reels each user is likely to be interested in, based on the four key factors above. The more Reels you watch, the more signals of interest Instagram then has in order to determine what you want to see, with the additional, direct factors of Likes and comments also playing a big part. Instagram also wants to encourage engagement, so if you're more likely to subsequently create your own Reels based on the original, you'll see more of that content as well. For creators, that could be another reason to try and tap into trending audio to help maximize exposure for your clips.
Instagram also shares the signals that can boost Reels reach. Each user will see more content based on their past engagement history, and the specific details of each clip (including the audio again). We don't know how detailed that process is, we don't know, but it could get very precise about your visual preferences.