Javascript SyntaxError occurs when the Javascript engine encounters code that does not conform to its syntax rules, often due to incorrect use of predefined syntax such as missing braces or quotation marks. These errors are detected during code parsing and cannot be handled with try-catch blocks, but can be identified using the window.onerror() function to log errors and notify programmers of necessary corrections. Minimizing syntax errors requires meticulous attention to detail to ensure all code expressions are correct. Tools like Rollbar can assist developers by automating error monitoring, analysis, and management, providing a more confident and efficient approach to handling Javascript errors in real-time.