Harvesters are machines used in agriculture to efficiently gather crops from fields. They can perform multiple tasks, such as cutting, threshing, and cleaning, which helps farmers save time and labor. Common types of harvesters include combine harvesters, which are designed for grains, and forage harvesters, used for crops like corn and grass. These machines come in various sizes and designs, suitable for different types of farming operations. By using harvesters, farmers can increase productivity and reduce the amount of manual labor required during the harvest season, ultimately leading to more efficient food production.