Next you can update your site name, avatar and other options using the _config.yml file in the root of your repository (shown below).

“Data science is the art of finding reality in the light of data, and not mirroring the data from many angles”

–Judea Pearl

The answer is quite simple, knowledge discovery. It can help us find patterns using statistical approaches, learn to fit a curve based on the data. And finally predict something based on learnt data