Final answer:
To collect the number of times users downloaded a product catalog, set up an analytics system or tracking tool and use event tracking to record every time a user clicks on the download button. This will provide the total number of downloads.
Step-by-step explanation:
To collect the number of times users downloaded a product catalog, you would set up an analytics system or tracking tool. One feature that could be used to collect this data is event tracking. You would add event tracking code to the download button on your website, and every time a user clicks on that button, it would be recorded as a download event. The tracking tool would then provide you with the total number of times the product catalog was downloaded.