Why should you use a password manager? Well, here’s a reason.
So your password can’t be cracked.
So you can easily use a different password for every site.
If one site is hacked, then the bad guys will try your email and password at lots of other sites just to see if they get a hit. Same password on different sites? Bad idea.
Let’s look at the math of password cracking.
There are about 3000 common words in English, and most other languages.
So if you pick, for example, an easily remembered password containing two words, with initial capital letters, and then follow those two words by three numbers, you get:
3000*3000*1000 possible passwords or:
Sounds like a big number, right? Not really. Not only can modern graphics cards whiz through these in a few hours, but if the website where passwords were stolen did not use a different “Salt” for every password hash, then they can “pre-make” a list of the hashes and then look for matches in much less time. Instantly. It’s just a look in a table rather than a search with billions of calculations. Does the site where you last typed in your credit card “salt” their hashes? Salting is adding some gobbly gook to your password before they hash it. And the gobbly gook is different for every customer. Yep. Keeping track of passwords is that complicated. I’m not going to cover it all here. Just saying, it’s a complicated business and many companies short cut the process, or don’t use modern security methods to keep track of passwords.