An online clothing retailer is already collecting eCommerce events (like item_id and price) in Google Analytics. They now want to upload a single file containing additional product attributes from their inventory system — like color, style, and material — to enrich their existing reports. Which Google Analytics feature is specifically designed for this type of bulk upload to join offline information with online records?

They should use Data Import. It lets a business upload a file of additional attributes and join it to data already collected, matching on a key such as item_id. The retailer is already sending item IDs and prices with their ecommerce events, so importing a product catalogue file adds attributes like brand, supplier, colour, size or margin against those existing items, and reporting can then break revenue down by dimensions that were never sent from the website. This is a common and high-value setup, because it avoids bloating the tracking code with attributes that already exist in the inventory system. It also suits data that changes on its own schedule: the file can be refreshed when the catalogue changes, without any website deployment.