Scalers are tools or devices used to increase the size or scale of an object or signal. In various fields, such as mathematics and engineering, scalers help in adjusting dimensions or values to fit specific requirements. For example, in computer graphics, scalers can resize images without losing quality. In the context of data processing, scalers are algorithms that normalize or standardize data values. This is important in machine learning, where different features may have varying ranges. By using scalers, such as Min-Max Scaler or Standard Scaler, data can be transformed to improve the performance of models.