Feature Engineering - What Is It?

It's actually rather structured, I would argue, because the timestamp for instance by itself, it's just a column of column of arrival. So all these are quite structured in a sense. And then for the app locker usage, it's also just a column indicating how many ads are being blocked, if at all. The non ad clickers, you're not even going to pay for their impressions anymore. They're self filtering. Exactly. That's even a good news for advertisers.