When I first got my Mac, it came with all the standard applications found in the applications folder. I used to find that opening an application from the applications Grid, on the Dock, was much easier and quicker than opening an application through the Finder.
Over time, with more applications being installed on my computer, my applications Grid became larger and larger. Instead of seeing a small bunch of icons that I could easily recognize and navigate, I literally had dozens of icons on my applications Grid. This made it very difficult to distinguish the one application that I was looking for. It was like looking at a sea of multi-colored icons that were all blurring into one. Maybe you know what I'm talking about?
Naturally, I had my most used applications accessible directly from the Dock, but for all of my other applications, I started using the Finder or Spotlight to locate and launch them instead. That is, until a friend showed me an obvious way to navigate a Grid and launch an application very quickly.