How do you buy on CoinMarketCap?

Excuse me, could you possibly elaborate on the process of purchasing cryptocurrency through CoinMarketCap? I understand that it's a platform that provides market data and analysis, but I'm a bit confused about how one actually goes about buying coins on it. Do you need to use a separate exchange or wallet? Are there any specific steps I should follow to ensure a smooth transaction? I'd really appreciate it if you could guide me through the process. Thank you in advance.