What is HALAL?  
Halal is an Arabic word which means "lawful or permissible" .Halal Products are" universal" products not only suitable for Muslims consumption, but also for everyone, including non Muslims. For food products, Halal also means high quality, hygienic, safe, 'honest' and having high concern for animal welfare.
What is Haram ?  
The opposite of Halal is Haram, which means unlawful or prohibited. Haram means unlawful or prohibited for consumption. The prohibited categories mentioned in the Quran include the following:(a)Carrion, or the meat of dead (unslaughtered)animals(b)Carnivorous animals, birds of prey and land animals without external ears(c)Blood and blood by-products(d)Swine/pork and its by-products(e)Animals blessed to others than God (Allah) i.e., to idols(f)Intoxicants, including alcoholic drinks(g)Foods contaminated with any of the above productsAllah (S) knows best.
What is Mashbooh ?  
Mushbooh means suspect, in doubt, or questionable. If the origin of a certain food item is in doubt, or there is uncertainty about its permission or prohibition under Islamic laws, then the product is considered Mashbooh. A wide range of products in todays marketplace fall under this category, which forms the gray area between what is permitted and what is prohibited. While many things are clearly Halal or clearly Haram, there are some things that are not clear. These items are considered questionable or suspect and more information is needed to categorize them as Halal or haram. Foods containing ingredients such as gelatin, enzymes, emulsifiers, etc. would be Mashbooh because the origin of these ingredients is not known.Allah (S) knows best.
What is Makrooh ?  
Makrooh means detested or discouraged. Products that are discouraged by God or His messenger, Muhammad (peace be upon him): are offensive to ones psyche: or may be otherwise harmful fall under this category, including stimulants and smoking. Allah (S) knows best.
How do we know that the meat at the Halal store is Halal certified ?  
A Muslim consumer must make sure that the Halal meat is certified by an authentic Halal certifying organization. The certification should be by a third-party, not the manufacturer and not the retailer.Allah (S) knows best