  Deterministically integrating single solid-state quantum emitters with
photonic nanostructures serves as a key enabling resource in the context of
photonic quantum technology. Due to the random spatial location of many
widely-used solid-state quantum emitters, a number of positoning approaches for
locating the quantum emitters before nanofabrication have been explored in the
last decade. Here, we review the working principles of several nanoscale
positioning methods and the most recent progress in this field, covering
techniques including atomic force microscopy, scanning electron microscopy,
confocal microscopy with \textit{in situ} lithography, and wide-field
fluorescence imaging. A selection of representative device demonstrations with
high-performance is presented, including high-quality single-photon sources,
bright entangled-photon pairs, strongly-coupled cavity QED systems, and other
emerging applications. The challenges in applying positioning techniques to
different material systems and opportunities for using these approaches for
realizing large-scale quantum photonic devices are discussed.
