Data Science is all about - - > Observing --> Analyzing --> Reacting.

As in real life, we observe people analyze their behaviour and then react in a specific way. As our behaviour towards children is really different from our behaviour towards our friends. So, what we do here is, we analyze historical behaviour and react according to that.

Data Science is simply applying advanced analytics techniques to draw valuable insights from data for better decision planning, future planning and whatever you want to do with those insights. Those insights may help you with your future strategies to increase profit if you are a business professional and you use those insights to your advantage.

Machine learning (a field of Data Science) allows the user to feed a computer algorithm an immense amount of data and have the computer analyze and make data-driven recommendations and decisions based on any input data given by the user.