Staying connected without paying steep roaming fees.
Local prepaid SIM cards are usually the cheapest way to get data abroad, and many airports have kiosks selling them right after you land. eSIMs have made this even easier, letting you set up a data plan before you even leave home.
For road trips especially, download offline maps in advance, since rural areas often have weaker signal than city centers. A portable hotspot is worth considering if you're traveling with multiple devices or people.