Integrated photonics enables the synthesis, processing and detection of optical signals using photonic integrated circuits (PICs). It has rapidly transformed numerous fields and applications by enabling faster and more efficient ways to process and transmit information, as well as new techniques for telecommunications, sensing, medical diagnosis, and quantum computing, just to name a few. With its intrinsic high speed, large bandwidth, and unlimited parallelism, integrated photonics plays a critical role in handling high-throughput, data-intensive applications. Over the past few decades, the successful translation from laboratory research to commercial deployment has established integrated photonics as a standard technology widely used in high-data-rate telecommunications and datacenters. With the development of heterogeneous integration for various material platforms, researchers have demonstrated myriad novel devices, including miniaturized classical and quantum light sources, micro-resonator frequency combs, ultrafast electro-optic modulators, programmable MEMS-controlled circuits, and large-scale on-chip photonic networks. These advancements are continuously impacting our society and opening up new opportunities in areas such as optical communications, photonic computing, frequency metrology, and LiDAR.