Ask "How'd it go?" to get news from someone about a major event like an interview, a speech, their first day of work, a date, etc.
"How'd it go?" is similar to "How was ___?" But "How was ___?" is asking for someone's opinion or evaluation of an event. For example, you could ask:
How was the movie?
How was your vacation?
You ask "How'd ___ go?" when someone has tried to do something, and you want to know the result:
How'd your meeting with Microsoft go?
"How'd" is a contraction of "How did". "How'd ___ go?" is more casual than "How did ___ go?"