Why is it important to store fats and oils in tightly covered containers?

Storing fats and oils in tightly covered containers is important to prevent oxidation, which can lead to rancidity and off-flavors. Exposure to air, light, and moisture can degrade these products, reducing their quality and nutritional value. Additionally, proper sealing helps maintain freshness and protects against contamination from bacteria or other external elements. Overall, this practice extends the shelf life of fats and oils.