“How'd it go?”

Your wife applied for an open position at her company. She had an interview earlier today. Now you've called her to ask about it. After she answers the phone and you say hello to each other, you ask:

How'd it go?

How'd (something) go?

When someone has a major event, such as an interview, a speech, their first day of work, a date, etc., you ask "How'd it go?" to get news from them about the event.

This question is similar to "How was ___?" But the difference is that "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?

But you ask "How'd ___ go?" when someone has tried to do something, and you want to know what the result is:

How'd your meeting with Microsoft go?

"How'd" is a contraction of "How did". This version is more casual than asking "How did ___ go?"

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In the example above, the speaker asks "How'd it go". That's because the interview was an important event, so both the speaker and listener are expecting to talk about it as soon as they talk to each other.