Britannia started in 1982 in Kolkata with an initial investment of Rs. 295. It has since grown to offer a wide range of bakery products across India and internationally. Britannia utilizes various marketing strategies like market segmentation based on age, income, and occasion. They target different products to different segments and position their major brands like Tiger, Good Day, and Marie Gold for kids, daily eating, and health respectively. Britannia focuses on quality, relationships, and monitoring competitors to achieve success.