The website your boss doesn't want you to know about: he won't be able to deny you a raise.

Everyone wants to be paid more at work, but simply asking for it isn't always the most effective solution. In most cases, you need to provide compelling reasons to prove that you truly deserve a raise.

Many times this can be done by showing your good results or the impact you've generated on the business, but in many cases the crucial detail that makes the difference is the skills or knowledge you may have.

In most cases, the most highly trained workers, and in principle, the most skilled, are the ones who earn the most because their skills are not only valuable, but also differentiate them from most others. You might think the only way to acquire them is through an expensive master's degree, but the reality is that there are hundreds of fully online courses that have official certification and can give you the keys to that long-awaited promotion.

But finding courses isn't easy, so in this article, we introduce you to the Alison platform , a free website that connects you with more than 5,500 courses with certificates and diplomas to choose from, with new options added weekly.

You can find courses in all categories, including computer science, health, business, marketing, engineering, programming, and even education, among many other options. The great advantage is that you can sign up whenever you want and complete it at your own pace, completely online , which can be a great option this summer.

The vast majority of these courses are funded by some of the world's leading universities and institutions, from universities like Cambridge and Stanford to companies like Google and Microsoft. Although the courses are generally free, you will have to pay to receive the official qualification.

Within the same website, you can find an aptitude test that will help you find the courses that best suit you, so you can find and learn what your bosses are looking for and then be able to ask for that raise you so richly deserve.