Reels are like slot machine
Any if the social media features such as reels, tictok, shorts or which ever name they call it is nothing but a slot machine.
Similar to the slot machines in vegas, these reels are designed to give you all you want emotionally. A cliffhanger of a moview, a funny joke, sometime suggestive anything and every thing that you desire from entertainment.
What they have realised is that they can keep dangling the jackpot reward and keep showing almost satisfying videos. This allows them to test showing videos that have an agenda.
The agenda could be political, economical or something else. The important point to remember is that will you spend your while day at the slots machine in Vagas? That's exactly whats happening when we spends hours on these social media sites such as Instagram, Twitter etc.