Event parameters are extra pieces of information that make your tracked events more useful. While basic tracking tells you what happened, parameters tell you more about how and why it happened. Think of them as tags that add context to each event you track.

For a product view event, useful parameters might include the product name, price, category, and whether it's in stock. These details help you understand not just that someone viewed a product, but exactly what they were interested in. Similarly, for a search event, you might track the search term used, number of results shown, and whether any filters were applied.

When choosing parameters, focus on information that will help answer important business questions. For example, tracking the source parameter (where users came from) and device type (mobile or desktop) can help you understand which marketing channels and devices drive the most valuable user actions.