Land clearing is hard to undo, so it's worth understanding exactly what's being proposed before work starts.
Questions worth asking
Ask what specifically will be cleared and what will be left standing, especially if you want certain trees preserved. Ask what happens to the cleared debris — hauled off, piled, burned or mulched — since that affects both cost and what your property looks like afterward. Ask whether stump removal is included or a separate step.
Ask how the company determines pricing — per acre is common, but the quote should reflect an actual look at your property's vegetation density, not just acreage on paper.
Red flags to watch for
Be wary of a quote given without a site visit, vague answers about debris disposal, or a company unwilling to discuss selective clearing if that's what you're after. Clear communication before the work starts is the best predictor of a clearing project going the way you expect.