Exploring Ebay Car Sale Data (Last Seen)

Screen Link: https://app.dataquest.io/m/294/guided-project%3A-exploring-ebay-car-sales-data/5/exploring-the-date-columns
I am finding it difficult to understand the interpretation of the autos[“last_seen”] part in Exploring Ebay cars sales data. Why it has something to do with the crawling period ending?

Because last_seen corresponds to the lastSeenOnline column in the collected data.

As per the dataset description -

lastSeenOnline - When the crawler saw this ad last online.

Since the website is being scraped by the crawler, then the last time it crawled the website would be the last time it would have seen any ad as well, if it was still up at that point.