Linked from
The 7 pages that link to Steam reforming, each with the reason it gives.
HydrogenRelated: It is the leading industrial route for producing hydrogen from natural gas.
MethaneRelated: It is the dominant industrial route for making hydrogen from methane.
SteamRelated: Water vapor serves as a reactant in a major industrial hydrogen process.
SyngasRelated: It is a major route for producing syngas from natural gas.