Hi Leon,

Thanks for your question. You can currently spent your merits in the guild store. If you go to shop on Splinterlands in the right corner you see Guild. If you are part of a guild you are able to spend those merits. I like to buy gladius cases (packs). They contain Gladius cards which you can use in Guild Brawls.

Also in Guild Brawls you earn merits. In the future they anounced that they will also rewards some SPS to guild brawls. Right now could be a moment to start earning a lot of Merits so you can earn SPS in the future.

I hope this helps!