A tutorial article on entanglement-based quantum information technologies was just published on Advances in Optics and Photonics. You can find it here.
It not only introduces the concept of entanglement, but it also delves into applications ranging from quantum metrology, quantum illumination, quantum imaging, light-matter interaction and spectroscopy, quantum machine-learning, to quantum communications. A lot to read and hopefully to enjoy : )
A big thanks to our colleague Zheshen Zhang from University of Michigan, USA, for getting this huge effort done!