Keep in mind they can kill your creature in response, so make sure to pick your spot carefully
In combo shells, it assembles specific land packages on the spot Valakut lines, Field of the Dead setups, or whatever youve tuned your build around
Similarly, you only have so many creatures that benefit from having a lot of auras around, and they give you a clear direction to go in
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Just turn it sideways, and you get free cards, sometimes a few, sometimes several
If tapping a creature using convoke wouldn't pay for any mana in that spell's cost (because you've already paid for all of the mana in the spell's cost by tapping other creatures or because you've already paid for all of the generic mana in the cost by tapping other creatures and the creature you want to tap doesn't share a color with any of the remaining mana symbols in the spell's cost), you can't use convoke to tap that creature