This is an example of an opening called the Four Knights Game, which is commonly used by players like Wesley So, and Emil Sutovsky. I like to play the opening myself. That is an example of a Spanish variation, the most common.
There are a few ways to use this opening, however it is optimal for beginners.
Here is another example, called the Italian variation.
Hopefully this taught you something... as this is my first post as a news reporter. Thanks for reading!