Agriculture development initiatives on the part of humans have long been documented. Since
learning about the significance of this area, farmers and researchers have not stopped looking for
strategies and solutions to increase agricultural output and quality while also shielding it from
potential threats and stress. In place of agrochemicals, mechanisms using microorganisms as
biofertilizers and biocontrol agents have recently gained popularity. Utilizing advantageous
microorganisms is an environmentally benign tactic that plays a significant part in promoting
plant growth and in the biocontrol of plant diseases. Reduced chemical inputs and the usage of
harmful pesticides in agricultural soils may be possible with a greater understanding of how
these bacterial communities are used. The focus of the current review is on plant growth-
promoting bacteria (PGPB), and it provides a summary of their function in soil fertilization and
plant protection with a focus on their methods of action. This chapter includes a number of
PGPB examples that were taken from the literature. Examples of how these bacteria have been
used in agriculture are also included in this review.