A single toad can eat thousands of insects in a summer. Slugs, cutworms, beetles, grubs, mosquitoes, snails, pretty much whatever fits in its mouth and moves at night. It's one of the most effective forms of pest control you can have in a garden, and it works for free.
A toad hunts from dusk to dawn, sitting still and snapping up passing prey. On a good night it can eat dozens of insects, and over a season that adds up fast. It won't touch your plants. It's only after the things that do.
The catch is it needs a cool, damp place to rest during the day, and most tidy yards don't offer that. You can fix it in minutes: an overturned terracotta pot with a small entrance, placed in a shaded, moist corner works well. A shallow water dish nearby helps, since toads rely on moist skin to stay hydrated.
Do that, and a toad will often stick around, returning to the same shelter night after night. You've effectively invited a low-maintenance pest controller into the garden.