First of all I apologize if something is not clear to you in the text, I do not know English well enough.
Binance is a crypto exchange through which you can buy a lot more cryptocurrencies than on the Coinbase exchange. This stock exchange is currently the second largest stock exchange in terms of daily trading volume, which today amounts to more than 37 billion US dollars.
Since January 2018, Binance has been the world’s largest cryptocurrency exchange in terms of trading volume.
You cannot buy on this exchange with a credit / debit card because there is no exchange rate against fiat currencies, here you buy with Bitcoin or Ethereum. This means that you first need to buy Bitcoin or Ethereum, send it to this exchange and invest in altcoin of your choice through it.