Halal is a Quranic term that simply means 'permitted' or 'lawful'. Halal when used in relation to food and other consumables means permissible for consumption and used by Muslims based on the Islamic law, which is the Shariah.
“Halal (Lawful) is clear and Haram (unlawful) is clear; in between the two are doubtful things, which people may not know whether they are Halal or Haram. One who keeps away from them in order to safeguard his religion and his honor is safe. Anyone who gets involved in these doubtful things may fall into the Haram (unlawful). This is related to one who grazes his animals near a Hima*; it is quite likely that his animals will stray into it. Indeed, every King has a Hima and Hima for Allah is what He has prohibited”
Benefits of Halal: