Good night.
I received a positive karma but I don't know when and for what post I wrote.
I'd like to know also who give me positive karma.
I think is important know these aspects to learn how increase own karma.
Thanks.
Good morning.
You received positive karma from an unknown member for posting something useful. Congratulations by the way.
You don't know who, therefore you don't know why, therefore you can continue to try and post useful content regardless

This saves member attempting to repeating "karma receiving posts" in order to gain karma, or karma begging to certain members who regularly grant karma, this would be annoying. This forum isn't about earning karma, it's about being part of a community and helping each other out. Giving and receiving karma is just a part of that.
Take care.