Private cloud storage, vpns, proxies, antidetect browsers

There is so much stuff out there now. Private cloud storage, vpns, proxies, antidetect browsers. And all of it exists for a reason. Right now I am trying to figure out proxies specifically, because I am starting to work in marketing, and there is a good chance I will need them. I was also recommended a site where you can pick the most suitable proxy type. It turned out there are different ones for different tasks, and it does not always make sense to pay for the most expensive option.