What does the circle with line through mean on the dash of a Volkswagen golf mk4?

The circle with a line through it on the dashboard of a Volkswagen Golf MK4 typically indicates a malfunction in the brake system, often related to the brake fluid level or the brake booster. It may also signal issues with the ABS (Anti-lock Braking System). It's important to check the brake fluid level and consult a mechanic if the warning light persists, as it can indicate a serious safety issue. Always prioritize addressing any brake system warnings promptly.