The YouTube video "SCAMS on Poshmark in 2024" by AlinaLeonardo details five common scams on the online marketplace Poshmark and provides practical tips to avoid becoming a victim. The video highlights scams involving fake items, shipping schemes, unauthorized transactions, phishing attempts, and fraudulent requests for cash deposits. The creator emphasizes the importance of verifying sellers, conducting transactions within the Poshmark platform, enabling two-factor authentication, and staying vigilant against phishing emails and messages. By following these guidelines, Poshmark users can enjoy a safe and secure shopping experience.