Data science

Data science is the craft of using maths, statistics, and code to find answers in data. Data scientists build models that forecast sales, spot unusual transactions, or predict which customers will leave. Big companies hire whole teams of them. Most small businesses don't need a data scientist. Many everyday questions, like what sold best last month or which clients are due for a rebooking, can now be answered by AI tools reading your own data in plain words. Where data science still matters is in getting the data right and knowing when an answer can't be trusted. A forecast built on six months of sales can be badly wrong, and it's worth knowing that before you order stock on it.