Hi and welcome! Almost any reasonable deck of cards will be fine but the main brands used in most magic effects are Poker size Bicycle Brand, Tally Ho, and other cards made by the US Playing Card Co. You can get special decks and equally special cards in the same designs to mix in with regular cards if required. Check out any of the online magic suppliers, especially cards4magic.co.uk (
www.cards4magic.co.uk ) to see what's on offer.
Other brands are used, some from Europe, some from South Africa but it's really down to what you feel happy with. Just to confuse things, Paul Daniels always seems to use standard Waddington's cards when I've seen him perform! If you check through the Review sections and/or use the Search function you'll find a lot of previous postings on the topic of which cards - so make a flask of coffee, a large bag of sandwiches, take the phone off the hook and browse away!