All bar tape does the same things, adding comfort when you grip your bars and upping your hold. But gravel needs that more than most drop bar riding, as the surface is rougher than most roads and there's more need for steering precision, often over more tricky terrain than on road.
So brands that sell bar tape are increasingly offering gravel-specific tape that's either thicker than their standard road-going bar tape or adds extra grip - and often both. Having said that, you should be fine with any road-going bar tape too, as modern bar tape is a lot thicker and more technical than the cloth tape with which road bike bars used to be wrapped.
Your gravel bike bar tape is likely to get dirty, so you need a surface that's easy to clean. Bar tape is usually made of closed cell polyurethane foam with a tough surface, so it's relatively easy to clean up and even scrub to remove ingrained dirt. It's also usually removable and reusable and should have enough stretch to give a firm interface between the tape and the bars.
Some brands make their gravel bike bar tape a bit longer than the two meters that's more typical for road bike bar tape, which means there's a bit more available to wrap extra-wide gravel bike handlebars. You may still find you need to try a couple of times to get good coverage though. Fortunately, most gravel bike bar tape is designed so that you can wrap and unwrap it without degrading the grippy inner surface that holds it in place.