If you shoot landscapes or anything involving scenes with a lot of depth, figuring out how to keep everything in focus can be a bit of a tricky problem. There are a few ways to go about this, but one of the most efficient ways to go about this is by using the hyperfocal distance. This great video will introduce you to hyperfocal distance and how to use it.
Coming to you from Michael the Maven, this helpful video will introduce you to the concept of hyperfocal distance. It is often the case in landscape photography that you will want to get as much of the scene in focus as possible. You might consider just further stopping down, but eventually, you will encounter softening due to diffraction. One option is focus stacking, and while this will certainly accomplish the task, it is a relatively tedious process. Using the hyperfocal distance allows you to get as much in focus in one exposure as possible. This is accomplished by using the closest possible focal distance that still keeps objects at infinity in focus, thereby keeping everything from the extreme background to the hyperfocal distance reasonably sharp. It's a very useful technique that every landscape photographer should know. Check out the video above for the full rundown.