  We present the SARAO MeerKAT Galactic Plane Survey (SMGPS), a 1.3 GHz
continuum survey of almost half of the Galactic Plane (251\deg $\le l \le$
358\deg and 2\deg $\le l \le$ 61\deg at $|b| \le 1.5\deg $). SMGPS is the
largest, most sensitive and highest angular resolution 1 GHz survey of the
Plane yet carried out, with an angular resolution of 8" and a broadband RMS
sensitivity of $\sim$10--20 $\mu$ Jy/beam. Here we describe the first publicly
available data release from SMGPS which comprises data cubes of
frequency-resolved images over 908--1656 MHz, power law fits to the images, and
broadband zeroth moment integrated intensity images. A thorough assessment of
the data quality and guidance for future usage of the data products are given.
Finally, we discuss the tremendous potential of SMGPS by showcasing highlights
of the Galactic and extragalactic science that it permits. These highlights
include the discovery of a new population of non-thermal radio filaments;
identification of new candidate supernova remnants, pulsar wind nebulae and
planetary nebulae; improved radio/mid-IR classification of rare Luminous Blue
Variables and discovery of associated extended radio nebulae; new radio stars
identified by Bayesian cross-matching techniques; the realisation that many of
the largest radio-quiet WISE HII region candidates are not true HII regions;
and a large sample of previously undiscovered background HI galaxies in the
Zone of Avoidance.
