At its core, LaTeX puts things in boxes and then puts the boxes on a page. So these commands are central.
There are many packages on CTAN that are useful for manipulating boxes. One useful adjunct to the commands here is adjustbox.
|• \mbox & \makebox:||Horizontal boxes.|
|• \fbox & \framebox:||Put a frame around a box.|
|• \parbox:||Box with text in paragraph mode.|
|• \raisebox:||Raise or lower text.|
|• \sbox & \savebox:||Like |
|• lrbox:||Environment version of |
|• \usebox:||Print saved text.|