In the wild jungle that is the internet, there are several different herds that you can become a part of.
Once you have chosen a herd, you will climb the hierarchy of that herd, slowly but surely climbing the ranks. As you climb the rankings, you get to eat before the other animals who are lower than you in the hierarchy.
Once you become the alpha (also known as ranking first), you will eat first, before any other animal does. In the jungle, that means getting first pick of the food. In the SEO world, that means that people view your page in the search results before they view any other organic listing.