Seaweeds are marine autotrophic creatures that contain a variety of interesting bioactive compounds. It has been an integral part of various cultures for centuries due to its versatility in culinary, agricultural, and medicinal applications. Seaweeds have a wide range of medicinal uses because they contain rich stores of bioactive compounds which are not present in terrestrial food sources such as polysaccharides, polyphenols, pigments, vitamins, and minerals. It contains polysaccharides like alginate, fucoidan, and carrageenan that have anti-inflammatory, antioxidant, and immunomodulatory qualities. These compounds have shown their potential in the management and prevention of various types of chronic illnesses, such as cancer, cardiovascular disease, and inflammatory diseases. Seaweed is higher in certain health-promoting compounds and materials, such as dietary fiber, omega-3 fatty acids, essential amino acids, and vitamins A, B, C, and E, than terrestrial plants and animal-based diets. Moreover, the abundance of polyphenols found in seaweed, including phlorotannins, has been linked to their possible neuroprotective, anti-diabetic, and anti-cancer properties. These substances exhibit the capacity to scavenge free radicals, reducing oxidative stress and the health risks that are associated with it.