Halal Certification allows you to sell your product to Muslim consumers and also give you legitimacy to international markets, not only in Muslim countries but also to other countries where Muslims reside.
There are about 7 million Muslims in the US have a combined purchasing power of US$200 billion. Internationally, there are 1.8 billion Muslims (~25% of world population). Muslim countries in general have strict laws that ban the sale of non-halal products. Halal certification will allow your company to tap into this huge Halal markets.
According to the State of the Global Islamic Economy Report 2016-7 by Thomson Reuters, the global halal economy is estimated to be worth around USD 3.9 trillion. Growing at an estimated annual rate of 20%, the industry is valued at about USD 560 billion a year. Thus, making it one of the fastest growing consumer segments in the world. In 2018, it is expected to hit the USD 6.4 trillion mark
Muslim countries are aware of the fact that Halal certified foods are sold at a premium prices.The additional expense of Halal certification pays you back many folds in terms of new market penetration