In chapter 3 we learned about how search engines work and how to get the best out of them. Here we can filter our searches and find only pdf if desired and other more stuff. Personally, I find it very useful if you already have a clear picture of what you are looking for, I will use it and I will use it for sure in the future. Going back to about a year ago I was looking for a book I wanted to read, and I found it, so I was able to download it, however, if I knew about these features back in time, I would’ve gotten my book much sooner. In class we went over the operators, they work just like in a programming language, so I was just chill on that part, then we also encountered symbols which were still familiar since we all had used those since forever. One thing I really like about using your search engine with the filters is that you barely see ads or irrelevant information while doing your searches.