Advertising is the most important thing in the business world.
There are companies who use all of their funds to advertise in their early years, and other companies which are considered as the best regarded companies in the world, such as Venard Media, use only 5% of the profits, and the remaining funds are used for advertising. Thus, you see how a company moves from a small one to the largest within a few years!
The best advertising mechanism differs according to the product and the targeted group. For example, if it is expatriates, then Facebook is the best platform for advertising, while if the targeted group is teenagers, then Snapchat would be the best, and so on.
Overall, it depends on the person himself, the amount he has, and the products.