Data science is about extracting knowledge from all types of data using science. It's a very big field inside Computer Science and very popular.
Data science has several sub fields:
Exploring Data: Investigate the data. This is often the first step with a new data set, exploration and analysis.
Visualization of Data: Present the data in different ways, plotting with matplotlib and others.
Classical Machine Learning: Algorithms that use data and statistics. Instead of traditional artificial intelligence where you rely on preprogrammed rules, machine learning algorithms use the data itself. Meaning that for a new problem, new data can be used.
Deep Learning: Using neural networks to solve problems. Neural networks are modeled after the human brain and sometimes referred to as Artificial Neural Networks.
Data Storage and Big Data Framework: There's more data created now than any other time in history
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