James and Darien,

due to relevant specs a service worker is a necessary pre-requisite to run a website as a PWA (Progressive Web Application) for example.
More background information is available at
https://developers.google.com/web/fundamentals/primers/service-workers

Can we at least know what its for

hey there i love all the work being done to improve the platform but in this case im a little confused, what does this component actually do?

I love it! Thanks Mr.!