What do companies mean when they say AWS?

Hi, I am new to AWS and stuff and saw that several job listings say that one should know about AWS. Now Amazon Web Services are huge and vast, can somebody tell me exactly what a Full-Stack dev should learn in AWS and what are the things that he/she should know?

In a nutshell, what do companies want or mean when they say that one should know AWS, Azure, or GCP!

submitted by /u/FrostZTech
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