Going on the assumption you are asking about using point focus vs area focus, there isn't a perfect answer and it depends entirely on what your skill with the focus system is, the capability of the focus system and what you are shooting.
The strength of area auto focus is that it allows the camera to quickly find something to focus on without thinking about it, the weakness (and it's a doozy) is that the camera really isn't that smart and missed a couple of classes in mind reading. It doesn't know what you want to focus on, so it has to guess and often guesses poorly. You'll generally get images with SOMETHING in focus, but if there is a lot going on, there is a good chance the thing you want in focus won't be the thing it pics to focus on. If you are alert, you may notice it focusing on the wrong thing and then miss the shot while trying to get it to focus on the right thing.
Point, or the big brother zone AF narrows the scope down to a smaller portion of the image, giving you more of an ability to tell the camera where you want it to focus, but you now actually have to move the focus points to be in the area you want to focus. You can either move the points themselves (the only option if you are using a continuous focus) or you can use a one-shot type of focus that finds focus and stays there to move the camera to put the subject over the selected point, focus, then go back to your composed shot and capture the image. This is more work for the photographer and it may prevent the camera from finding something to focus on (if there is nothing to focus on under the selected area) but it also is FAR more accurate at choosing the correct thing to focus on.
As you get more experienced with it, you'll find yourself using point and zone a lot more as, overall, it is generally faster than having to fight with the AF choosing the wrong thing. It is a bit slower than when the camera gets it right the first time with area AF, but you have a consistent speed in getting the shot setup, which allows for better planning and it isn't that long when you get good.
If you happen to be shooting something that is easy for the camera to figure out the focus, or where there is lots of movement and point or zone AF isn't a possibility, then I'll move in to area AF for ease of use, but it isn't generally my preferred mode to be in. That said, I do normally put it in that mode whenever I give the camera to a non-photographer to take a picture with it since explaining point AF is a pain.