[UA→GA4] Advanced topics: Extended migration guides [Legacy]This section contains extended guides on how to migrate and adapt various Universal Analytics tagging scenarios to Google Analytics 4. [UA→GA4] Data collection and tagging [Legacy][UA→GA4] How gtag.js for UA maps to GA4 [Legacy][UA→GA4] Tips for switching from analytics.js to gtag.js [Legacy][UA→GA4] Migrate ecommerce data collection from UA to GA4 [legacy][UA→GA4] Event migration guide [Legacy][UA→GA4] About this event migration guide [Legacy][UA→GA4] Send events to both your UA and GA4 properties [Legacy][UA→GA4] Goal and conversion migration guide [Legacy][UA→GA4] About this key event migration guide [Legacy][UA→GA4] Google Analytics 4 conversion essentials [Legacy][UA→GA4] Map Universal Analytics goals to Google Analytics 4 conversions [Legacy][UA→GA4] Conversion use cases by marketing objective [Legacy]