What plants are called weeds? What harm do weeds cause? What are the benefits of weeds?

Weeds or weeds are plants growing in areas of agricultural land (Nettle, yarrow, dandelion, plantain …). The main harm from weeds (weeds) is that they reduce the productivity of other plants, through rapid and uncontrolled spread and a decrease in the fertility of mail due to an overabundance of these plants. Some weeds also have positive properties, they are often used in cooking various dishes and in the creation of medicines.