Cilantro is one of those plants that you either like to eat or don't. Fortunately I'm a fan, especially when it's in guacamole, but even if you don't like to eat it cilantro sure looks good when in bloom! I let my cilantro go to seed each year so that I can collect the seeds and plant it again. I don't do anything fancy other than sprinkle the seeds after they have formed where I want the cilantro to grow. Last year I did this right after they bloomed and a fall crop of cilantro appeared and lasted throughout the winter. The flowers appear as delicate clusters of white blooms which apparently are very attractive to some little tiny pollinator bees (could they be masons?) Underneath the bolted cilantro I planted summer squash from seed in an attempt to safeguard them from vine borers and squash bugs. We'll see how it works out later.
The cilantro is in one of my 3'x4' raised beds. I'll sprinkle the seed somewhere outside the garden for next year as there really aren't any pests that will bother it and I really could use the garden space.