In short, place sticks angled into the dirt so that they cross one other providing support against collapsing or bending and support any plants nearby. You do not necessarily need to craft support for each sing plant if they plants are bunched up. Vine type and light-starved plants (like some potato species) will try to climb upwards using anything they can grab, which is why the palisade supports are good for helping them with their initial climb towards the light until their stems harden, without shadowing them or potential, shorter companion species (e.g. clover = soluble nitrogen factory). The palisades also support the plants in case they momentarily sway downwards because of wind or irrigation water pressure, keeping them stable enough to prevent early stem-snapping.
The palisade style can be done up until one feet, after which it would probably get too dense and shadowing. You could build sparser safety nets against falling with some string and sticks here and there around the tops of the plants to block their falling attempts a bit. For long species, you need start making big up-right or slightly angled sticks to give your vines and the like something to grab onto. Species without tendrils such as tomato probably need some string to loosely align them with the support and to stop them from bending their lower stems with their top-growth’s weight. The more angled the up-right vertical stick, more stable the supports i.e. the less likely they are to fall or sway themselves. Some angled cross sticks are required for stabilizing the up-right sticks, especially if you do not have a higher-altitude point to string-connect them to.
Summary: angled stick palisades are very good at supporting short plants and the vertical support structures.

