No need to be so scathing. Everyone starts from somewhere.

As for actions you might want to take in regards to these order types when you're trading as the definitions of these types of orders have already been explained, people typically set stops on their trades to prevent excessive losses on trades because most people typically enter trades based on a certain amount of money being risked. Stop orders help you cap losses to a predetermined amount, though note that Coinbase Pro only lets you set limit stops now, and in some instances, your limit stop might be skipped over because it does not instantly execute onto the books. CBP actually removed market stops a few months ago AFAIK, dunno why but that's not a good thing in my eyes.

Generally, you use market orders when you need to quickly enter or exit a trade (usually during times of high volatility), and you use limit orders to enter or exit trades when things are calmer or when you don't necessarily need the speed of a market order so you save on fees too.