There is no strategy for winning at roulette. It’s a pure game of chance, and you can’t rely on patterns or other “systems” to help improve your likelihood of success. That doesn’t mean an online search won’t find you a number of examples of roulette strategy. You might also find references to methods of betting such as the Martingale system or the “cover the table” approach. These strategies won’t really help you win more at roulette, but they can affect how much risk you take on when you play.
The best strategy when playing roulette is to practice responsible gambling and be sure to stay within your means when you play. Learning the odds and payouts can help you enjoy the game more, too, while also helping you remain clear on the risks.