When there is a big prize behind every action of yours, whether it is a car, a university degree or a championship title, it prompts you to struggle even more to succeed. For example, an honors degree goal can help a student study harder than another who simply wants to pass the exams, regardless of the grade. Aims can act as an extra -- or even sole -- motivation, even when they are just a "personal bet" rather than a formal achievement.
Success, either as an assessment tool for academics and employers or as a means of self-assurance, is an important factor of professional and personal life. However, success is not a concrete value, like distance or weight; we can only measure it indirectly. For this purpose, reaching a goal can be a measure of success of a person's or organization's particular actions. For instance, when a company sets an aim of $1 million annual revenue and only accumulates $750,000, executives have to evaluate the problem and reconsider their views.
Objectives are particular goals that you must reach in order to achieve an aim. For instance, the essential requirements to travel to London from New York are airplane tickets, which cost you a few hundred dollars and a passport. Therefore, to achieve your aim of travelling to the British capital, you must a) apply for a passport to your regional passport agency and b) save money from your salary or allowance to pay for the flight ticket.
Clearly defined objectives can help evaluating whether an aim is a loss of valuable time and effort or worth struggling for. A motor sports fan's aim can be to acquire a sports car, for example. However, careful considerations on the main objective -- how to raise the money for it -- can show that buying the car in the near future is simply impossible and therefore he might change his focus to investing his money somewhere else.