Organic food is produced with very strictly controlled and limited use of chemical pesticides and fertilisers, and from animals allowed to roam freely and reared without the routine use of antibiotics, growth promoters, or other chemical drugs. It is also produced free from GM.
A statement that the product is organic, with some certification and/or logo should tell you that the product is properly controlled and produced to the required legal standards. Buying organic products supports more sustainable, environmentally friendly farming methods. Organic foods contain, on average, far fewer pesticides residues. Sometimes seasonal organic products don't cost much more than normal foods. Organic meat is expensive. You can save money by eating less meat and more vegetables, cereals, legumes and nuts. These are healthy and their production is less damaging to the environment than animal production.