/locate
/give
/help
/tp
/setblock
/placefeature * , **
/Clear
/DefaultGameMode
/daylock ***
/fill
/Gamerule
/Seed **
/Team **
/LOCATEAllows you to locate a structure such as a
Village or
Woodland Mansion/GIVEUsed in the previous question, it gives you an item that you can or cannot find in the creative inventory
/HELPAllows you to see more commands.
/TPAllows you to teleport to any given location.
/SETBLOCKAllows you to set a block at a given location.
/PLACEFEATURE* , **Allows you to place a given Mojang-Made Feature, such as a lake.
/ClearSelf-Explanatory, this clears your entire inventory.
/DefaultGameMode
Changes the default gamemode to whatever you chose. Such as | /DefaultGameMode Adventure | for making people who join your world not be able to destroy anything.
/Daylock ***Makes it so that it is only day.
/Fill
Fills something in blocks from 2 different places.
/Gamerule
Changes a gamerule such as RandomTickSpeed and AlwaysDay
/Seed
Shows you the current seed of where you are. Useful for if you found some cool looking terrain.
/Team
Allows you to change the team bar.
*Only able to be done during the latest snapshot. (22W03A)**Only available for Java***Only available for BedrockAlso see The Wiki Page, It says it far better then I do, I just build for fun and as a hobby.