Quantum field theories (QFTs) are frameworks in physics that combine classical field theory and quantum mechanics. They describe how particles, such as electrons and photons, interact through fields that permeate space and time. In QFT, particles are seen as excitations or disturbances in these underlying fields, allowing for a unified description of fundamental forces. One of the most successful QFTs is the Standard Model, which explains the electromagnetic, weak, and strong nuclear forces. QFTs have been instrumental in advancing our understanding of particle physics and have led to predictions that have been confirmed through experiments, such as those conducted at the Large Hadron Collider.