This article provides an introduction to loop quantum gravity, a background independent, non-perturbative approach to unifying general relativity and quantum physics. It outlines the conceptual framework, key physical questions in quantum gravity, and the progress made in addressing these issues. The paper emphasizes the underlying ideas and significance of results rather than detailed derivations. It discusses the reformulation of general relativity as a theory of connections, the quantization strategy, and the development of quantum theories of connections. The article also covers quantum Riemannian geometry, quantum dynamics, and applications to quantum cosmology and black hole entropy. It highlights the importance of background independence and the challenges in addressing singularities, black hole entropy, and the Planck scale. The paper also discusses the role of spin foams and the implications of quantum geometry for low-energy physics. The review concludes with an outlook on current directions and future research in the field.This article provides an introduction to loop quantum gravity, a background independent, non-perturbative approach to unifying general relativity and quantum physics. It outlines the conceptual framework, key physical questions in quantum gravity, and the progress made in addressing these issues. The paper emphasizes the underlying ideas and significance of results rather than detailed derivations. It discusses the reformulation of general relativity as a theory of connections, the quantization strategy, and the development of quantum theories of connections. The article also covers quantum Riemannian geometry, quantum dynamics, and applications to quantum cosmology and black hole entropy. It highlights the importance of background independence and the challenges in addressing singularities, black hole entropy, and the Planck scale. The paper also discusses the role of spin foams and the implications of quantum geometry for low-energy physics. The review concludes with an outlook on current directions and future research in the field.