Secondary metabolites of Kappaphycus alvarezii have attracted great attention due to their wide applications in various fields. These products are useful in food, pharmacological,cosmetic,agriculture and medical fields' .They can be used to produce drugs against human pathogens, an alternate nullifying agent for gelatin, skin moisturizer and also plant and animal nutrient. The knowledge summarized in this review regarding the commercial and microbiological aspects of Kappaphycus alvarezii would be a great help to study the importance of this algae, so that they can be effectively utilized against pathogenic microorganisms as well as the production of carrageenan.