In general, not much, (sorry to say, since I love them!). Slugs generally do a lot of damage. read more
The main benefit of snails for a gardener like me is that they are a good target to vent any frustrations I might have, if the gardening itself has not worked out the stress. Snails move slow, so they are easy to catch. The leave little slime trails and their damage is easy to spot, so there are pretty easy to find. read more