Considering opening a Goldman Sachs 3.65% online savings account and curious in how it works

Im 22 an have been able to save almost 15,000 dollars and a friend had mentioned that I can grow it with one of these accounts. They told me that it adds to my savings each month and and adds more the next month on top of those savings. For example in one month its 15,547 then in the second it will be 16,114 so at that rate at after a full year I’d have 23,055 is that correct? This is just letting it sit there and I gain