I'm not an expert on this but I've heard that hydrogen storage can be useful in some cases. It's not very efficient, but there's plausibly cases where it doesn't matter (like storing excessive power overnight from nuclear plants or excess power during the day from solar). It would have to compete with other storage solutions like batteries, molten salt, producing other fuels like natural gas, pumped storage, etc. though. When comparing it to other storage methods, it's important to keep in mind that hydrogen is a gas a room temperature, so it takes up a lot of space unless you use high-pressure and/or cryogenic temperatures to make it more dense. In case you're curious, some other use for hydrogen (even if producing it is inefficient) are industrial processes that need extremely-high temperatures (like steel production) and chemical processes that need hydrogen (like ammonia production).

It is not easy to store it for longer time, but that's one of the uses of hydrogen (for energy).