Regression Analysis is a statistical method used to examine the relationship between one dependent variable and one or more independent variables. It helps in predicting outcomes and understanding the strength of predictors, making it a vital tool in various fields such as economics, healthcare, and social sciences. By fitting a regression model to data, analysts can identify trends and make informed decisions. For instance, businesses can use regression to forecast sales based on advertising spend, while researchers might explore how education levels affect income over time.