Karma is the sum of the valuation points of all your articles, the "likes" you have achieved with all your articles. It is not useful nor does it imply an improvement in personal skills.
It's not even good enough to say your articles are better. If you do memes you will have more karma, if you write long texts, less; If you write more you will have more karma than if you don't write, simple.
It is also a question of renown: If you like people will give you karma in the articles, if you fall ill will give you negative.
Don't complicate or scratch yourself. Whoever presumes karma or fights for him deserves a slap with an open hand.
Here I leave a quote on Karma:
"Karma is like the likes on Facebook, not good for anything but everyone wants them" Nacho Fatule, 2018