How to tell if an NFT is real?

Could you please clarify for me how to authenticate the authenticity of an NFT? In the realm of cryptocurrency and digital assets, it's crucial to ensure the legitimacy of any investment. With the rising popularity of NFTs, it's become increasingly important to understand the verification process. Could you elaborate on the key indicators or methods that one should look for when verifying the genuineness of an NFT? Additionally, are there any common red flags or pitfalls that investors should be aware of when engaging in the NFT market? Your expertise in this field would be greatly appreciated in guiding me through this process.