chosen2k wroteDLC = Downloadable content. It can be anything, new maps, weapons gear for a certain game etc...
US: You buy the cards from amazon. Card value 50$ = 49.99$
UAE: You buy the cards from virgin Card value 50$ = $79 (as you can see, Virgin is amazing)
DLC are region locked so depending on the region of the game you have you should download the DLC from the correct store.
I know that there's a lebanese psn store however I never tried it, but I know that the prices are in dollars.
It's a bit tricky to buy US PSN digital codes from Amazon. I bought mine for 47$ here:
https://www.offgamers.com/game-card/consoles/playstation-network-card-us , I ended up saving 50 cents with the transactions :P (depends on your bank).
I can confirm that it's safe, I got my code in nearly no time.