Hello, I'm using GrowthBook for the first time. I would like to setup a very simple A/B testing on our website (change the text in one of the our main CTAs on our homepage). My tech stack is: Google Analytics 4 Google Tag Manager Umbraco CMS (We are not using BIGQUERY) I was trying to follow this video: I've created the sdk tag (will trigger with a custom consent event we have - not with "all page views") and I was about the create the additional events but then I saw that in the video, under "Data Sources" when creating the experiment (I've already created the feature flag) - they selecting GA4-BIG QUERY). Based on my tech stack - do I need to add this data source or it's not a must?

The data source is a must, as it's where all the exposure events are sent (which users got which variation). Google BigQuery would be a good choice for your setup, and they offer a generous free tier. We have docs on setting up GrowthBook with BigQuery: https://docs.growthbook.io/guide/bigquery