When you tax something, you get less of it. By reducing the supply of a good, taxes deter otherwise mutually beneficial transactions from happening; the loss of mutual benefit from a tax (or other policy) is called "deadweight loss".

Land value taxes have a special property in that land owners cannot respond to the tax by producing less land; the supply of land is fixed. This means LVTs do not generate deadweight loss, which makes them very efficient: https://en.wikipedia.org/wiki/Land_value_tax#Efficiency