In the year 1753 Carolus Linnaeus a Swedish botanist coined the term “algae”. Algae come under a division of the plant kingdom called Thallophyte which means, simple plants without roots stems, or leaves known as thallus. Algae are eukaryotic in nature but blue-green algae (cyanobacteria) are prokaryotic in nature. The composition of the eukaryotic algal cell consists of the cell wall, nucleus, endoplasmic reticulum, mitochondria, Golgi bodies, stigma or eyespot, vacuoles, flagella, and plastids. These organelles, possess various biochemical properties and to produce vital metabolic products by various enzymatic reactions and mechanism and action. Various species identified as food supplements due to its rich and maximum primary and secondary metabolites along with minerals and vitamins. Hence it is wonderful product as nutraceutical and pharmaceutical identified worldwide and commercialize many of them in herbal market to combat the health issues.