Ferrites are classified as a remarkable category of materials recognized for their extensive range of applications. Within the realm of ferrites, spinel ferrites are considered promising soft magnetic materials, exhibiting exceptional characteristics such as appropriate band gap, significant coercivity, elevated saturation magnetization, and enhanced thermal and electrical traits. Specifically, Nickel ferrites, which are categorized as spinel ferrites, constitute a type of magnetic materials that have attracted significant attention owing to their remarkable traits. This is the highly magnetic substance that demonstrates outstanding electrical, magnetic, and optical, and catalytic properties. Nickel ferrite has garnered extensive importance because of its wide-ranging applications, which include medical therapies, electronic devices, attenuation of electromagnetic waves, and as catalysts for the water purification. This prominence can be ascribed to its advantageous attributes, including elevated permeability, resistivity, and saturation magnetization. This review provides a comprehensive summary of recent research on nickel ferrites. There are four sections in this study. The first provides an introduction to spinel ferrites, including their structure. The subsequent section concentrates specifically on classification, and nickel ferrite. The third section critically examines research pertaining to various doping in nickel spinel ferrites, with the objective of augmenting their intrinsic properties. The final section discusses the structural, magnetic, and catalytic traits of NiFe2O4.