In Google Analytics 4 (GA4), a «hit» refers to an individual interaction that sends data to Google Analytics servers. Each «hit» represents a user activity on a website or application and can include a variety of actions such as:

• Page view: when a user loads a web page.
• Event: specific interactions such as button clicks, video plays, downloads, etc.
• Transaction: purchases or transactions completed on an e-commerce site.
• Social interaction: actions involving social media platforms, such as sharing content.

In GA4, hits are fundamental to collecting and analyzing data on user behavior, allowing marketers to understand how users interact with their content and optimize their strategies accordingly.