While click tracking is highly beneficial, it does come with some challenges: 1. Privacy Concerns: Tracking can be perceived as invasive, leading to trust issues with recipients. 2. Email Clients: Some email clients may disable tracking links or display warning messages, which can skew data. 3. Bot Clicks: Automated systems or bots may click links, giving a false impression of engagement. 4. Technical Issues: Incorrectly set up tracking URLs can lead to broken links and inaccurate data.