KRLW’s answer is great, as always, but I’ll like to add something.
As the question is tagged Competitive I’ll be answering it with it in mind, specifically the PU and NU Tier, where Palossand is used the most.
In PU and NU, Palossand is a great defensive Stealth Rocker because of a great typing, good bulk and ability to check dangerous threats like Passimian and all. You’ll usually be going for Earth Power on the Defensive sets, too. Earth Power let’s it pick a few 2HKO’s on the aforementioned Pokémon after some chip. Scorching Sands, even though appeasing, is usually a niche option on Palossand because it needs the power to get KO’s and all on a few weakened foes. The Burn doesn’t matter much, as it’s Defense and typing allow it to wall most Physically oriented attackers easily.
And, as KRLW said, the offensive sets would hate the power drop, so Earth Power on them always.
Hope it helped!