A job is an activity essential for survival and allows each individual to work and take part in operating in society. In the modern world, the concept of a lifetime job is fading and constant education and training is needed to find a favorable job. Most agencies are employer-paid, meaning that people looking for a job can register at no cost. If hired, the employer pays the agency, usually a percentage of the new employee's annual salary. Some agencies focus on executive level positions (commonly known as head hunters), while others focus on temporary positions (often referred to as temp agencies).