Conversions in GA4 compared to the previous version of Google Analytics are:

In GA4, conversions are highly flexible. You can designate any event that is collected as a conversion directly within the GA4 interface without needing to modify your website's code. This allows for tailored tracking of user actions relevant to your business goals. The previous version, Universal Analytics, required more rigid setup, often involving goal definitions based on destination URLs, event categories/actions/labels, or duration. The other options are incorrect because: GA4's use of machine learning and AI enhances insights but doesn't negate the need for conversion tracking; it often relies on properly defined conversions for predictive metrics. Not every conversion in GA4 requires a value parameter, although adding one is highly recommended for revenue tracking and deeper analysis. Conversions are not strictly predefined; their strength lies in their customizability based on your specific event data.