Why ensemble learning?
wisdom of the crowd : In many cases you will find that this aggregated answer is better than an expert’s answer.
Similarly, if you aggregate the predictions of a group of predictors (such as classifiers or regressors), you will often get better predictions than with the best individual predictor.
A group of predictors is called an ensemble;
thus, this technique is called Ensemble Learning,
and an Ensemble Learning algorithm is called an Ensemble method.
Popular Emsemble methods: