How does the Nol Card work in Dubai for tourists?

Hi, I'm planning a trip to Dubai and I've heard about something called the Nol Card, which is used for public transportation. I'm a bit confused and would like to know:

• ¿What types of Nol Cards are available?

• Which one is best if I'm only visiting for a week?

• Where can I buy and recharge the card?

• Can it also be used for taxis, parking, or other payments?

While searching, I found a helpful website that explains everything about the Nol Card, including how to check your balance and top it up

If anyone has personal experience or tips about using the Nol Card in Dubai, I’d really appreciate it. Thanks!