Current state:

* [commerce](https://bitcoin.stackexchange.com/questions/tagged/commerce "show questions tagged 'commerce'") has 14 questions

described as “The transacting of business using Bitcoin or related technologies”
* [merchants](https://bitcoin.stackexchange.com/questions/tagged/merchants "show questions tagged 'merchants'") has 6 questions

(without a description).

I was considering a merge, but I'm asking first whether there is any difference?
If there is one, how could the descriptions be updated?