Note that it's often difficult to tell if these signals are good or bad. For example:

1. Clicking on a link is often a negative signal. If you're searching for "when was barack obama born?", hopefully you get the answer on the search results page itself, so you never have to click. Or, the caption for each search result should have a snippet containing the answer.

2. If you stay a long time on the search result you click on, is it because the information is hard to find or because the page is deep and useful?

I used to work on Search measurement at YouTube and Facebook, and run a human evaluation platform now. Here's an example what they can look like when you use high-quality raters: https://demos.surgehq.ai/google-vs-bing/