Some people grow it and cut it as needed. Which is ideal. But to store it can be challenging. It doesn’t do well in plastic bags from the grocery store. Some suggest storing it with the tips submerged in water. Others say wrap it in a paper towel. Somewhere came the idea to wrap it unwashed in an absorbent cloth, then put it in the plastic grocery bag.
Periodically, remove any aging leaves and stems . Also at least once, replace the cloth with a fresh, dry one and turn the plastic bag inside out so any trapped moisture accumulated can get evaporated. With this method the coriander leaves can stay good for at least a couple weeks!