While a powerful brand identifier, designing favicons is not without its challenges. We've put together some of the main ones below, - Limited design space: Turning your brand's logo into a favicon friendly size can be a challenge, especially if you expect it to be able to convey the true messaging of your brand. - Security: Favicons can be used in a number of potential cyber security attacks including malicious code injection, malware, spoofing attacks and phishing threats. - Website load time and speed: As with all web images, favicons must be optimized for website performance, or they can negatively impact a site's load speed. - Accessibility: As a small image, favicons can be hard for accessibility purposes. They can be too small to include explanatory text or other cues. - Compatibility issues: Even with the standardization of files and formats for favicons, there can still be issues with how they display across different browsers and devices, which can impact how they are seen on the web.