Aggregators are extremely useful for finding the exact NFT you want by displaying all the NFTs in a collection across multiple marketplaces. The aggregators listed allow you to purchase right from the platform, and include tools that help determine rarity, and tensor even provides in depth trading tools and charts. By far the best way to explore collections and projects, MonkeBains highly recommends adding these tools to your arsenal of NFT bookmarks.
Tensor is by far the most in depth and professional trading aggregator for NFTs on Solana
Hyperspace is great if you are first learning about NFTs and would like a trading platform that includes all the popular marketplaces. Hyperspace is also a marketplace.