This is a process for trawling through lots of data that probably comes from many sources. It useful way to search relationships and facts are not immediately obvious casual observer. also used when the come sets structured in same way. Data Mining E.g. supermarket may have its loyalty card scheme shows few personal details plus purchases made. huge collection typical large supermarket. If you perform searches attempt find patterns some best algorithms will show whether certain products tend be bought together or by customer demographic group. start adding weather into algorithms might get correlations between hot ice cream that’s obvious but maybe out on rainy days people tendency buy mince pies? Algorithms help with mining known names such as: Pattern Matching Anomaly Detection has become possible because of: Big Databases Fast Processing.