General multitasking, team coordination, cash handling, basic restaurant dishwashing, stock management, industrial cleaning, pacifying unhappy customers, dealing with druggies and harassers, and a whole bunch of other things I've probably forgotten from when I worked fast food as a teenager.
The simplicity of each individual job means that nobody ever has just one job at a fast food place. Stick around for any amount of time and you'll get rotated through every available position.
Any of those skills can be picked up at basically any job, further they require no foundational skills to learn.
That's why the pay is low, because the skill set is widely accessible. I'm not sure why people insist that these kind of jobs are teaching valuable skills.
All that is happening is the basic process of working. They could learn it in any context, at any point in their lives. There is no justification to pay people starvation wages.
For someone that didnt go to college, seeing a 2yr stint on a resume as a fast food worker tells me more about that persons work ethic, reliability, and general sense of getting stuff done vs your avg grad.
Its not only skills but its the information being conveyed
The simplicity of each individual job means that nobody ever has just one job at a fast food place. Stick around for any amount of time and you'll get rotated through every available position.