HYSA or Normal Checking, What is difference?

You might be wondering how to put your money in a bank by saving it. Now banks offer interest(extra money) to make you keep money with them and not other banks but they loan that money to other people and make a profit. So most of the time you should invest in stocks. Although what if you need a emergency fund(in case you need money randomly) and want to earn the highest interest possible. That is a HYSA. Now normal checking account gives 0.01% to 1% interest, while HYSA give 3% to 5%. In a normal account if you put $10k you will get $1 but with a HYSA you can get $300 to $500 extra. So invest first then have this for your emergency fund.