Different Internet Service Providers, known as I.S.P.s, have different tiers. The various streaming services make different recommendations — typically available on their individual sites — as to the minimum requirements that allow their content to look sharp and run smoothly on different devices. Averaging their recommendations out, you’ll probably want to make sure that you have a minimum 4 Mb/s (that’s megabyte per second) connection, which, be warned, isn’t available in some of the more rural areas of the United States.
As cord-cutting has picked up steam, many cable companies are offering their own "skinny bundle" packages with internet and a few channels for less. It seems counterintuitive, but in 2018, "cutting the cord" can still mean sticking with your current cable company. The important thing when comparing these services is to look at the contract requirements and extra fees. Even if a service price looks the same as many all-streaming packages, if you need to tack on an extra TV box or two the monthly fees will add up quickly.