how is it going?Contraction of „geht es“. Its meaning depends on the expression: „Wie geht’s?“ means “How is it going?”, while „Worum geht’s?“ means “What is it about?” and „Es geht um …“ means “It’s about …”.
how’s it going / is it aboutShort for "geht es". Very common in spoken German; can ask about someone’s well-being or what a conversation/topic is about.