Let me share a scenario I personally encountered. One day, I came across an introduction to a Star Wars animation on a video recommendation website. I was drawn to the fancy covering image, which briefly flashed by in the homepage slides. However, I got busy with other things and only had time to search for it later that evening. Without this project, such information would have been almost impossible to find back because, as part of the website’s recommendation system, the content changes every time you refresh the web page. But this time was different, I was able to retrieve the content by searching for the keyword “Star War” and narrowing the search by time range.
Of course, I know that such a feature might seem trivial. Some things are simply forgotten and that’s fine. But what if it is a more important clue, like a bug for the web site which only trigger in some narrow condition and hard to reproduce.