Can I use this jack on gravel or soft ground?

Only on firm, level surfaces. Place a wooden block under the base on gravel or dirt to prevent sinking and tipping.

Do I need to maintain or store this jack differently?

Keep the saddle clean and free of dirt. Store in a dry location. Wipe down after use in wet conditions to prevent rust.

Is this jack rated for side-to-side work or just vertical lift?

Vertical lift only. Never tilt or lean the jack sideways during operation — it will tip and cause injury or damage.