Things I need to know when it comes to buying land ? How different is it from buying a home or a building? Closing cost, Taxes, interest rates, etc etc any helpful tips would be really appreciated please

Are you able to build on it is the most important question. My friend has land he wanted to sell. I tried to sell it for him I talked to over 50 people interested in the land but I couldn’t get one person to buy it because the land was useless the county wouldn’t let you build anything on it.