
mitkriegen
to notice
Colloquial for noticing, perceiving, or understanding what is happening around you.
Hast du mitgekriegt, dass die Nachbarn umgezogen sind?
Did you notice that the neighbors moved away?
to notice / to get
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to notice
Colloquial for noticing, perceiving, or understanding what is happening around you.
Hast du mitgekriegt, dass die Nachbarn umgezogen sind?
Did you notice that the neighbors moved away?

to get a share
Colloquial for receiving or getting a part of something.
Wenn du den Kuchen aufteilst, sorge dafür, dass ich auch ein Stück mitkriege.
When you divide up the cake, make sure I get a piece too.
'Mitkriegen' (to notice / to get) is a separable verb. The prefix 'mit-' comes at the end in a main clause; in subordinate clauses it stays attached to the verb, and in the infinitive with 'zu', 'zu' goes in the middle.
Ich kriege nicht alles mit, was hier passiert.
I don't notice everything that happens here.
This verb is clearly colloquial. It is very common in everyday conversation, but should be avoided in formal texts or emails.
Ich hab gar nicht mitgekriegt, dass du schon da bist.
I didn't even notice that you're already here.
If it is about information, news, or events, 'mitkriegen' (to notice) means 'bemerken' (to notice). If it is about divisible things like food or money, it means 'einen Anteil bekommen' (to get a share).
Hast du die Neuigkeiten über den Chef mitgekriegt?
Did you hear the news about the boss?
In the meaning 'bemerken' (to notice), 'mitkriegen' (to notice) is very often used with a subordinate clause that begins with 'dass' (that) or a question word (was, wer, wie: what, who, how).
Sie hat sofort mitgekriegt, dass etwas nicht stimmt.
She noticed right away that something was wrong.
to learn / experience
Erfahren neutrally describes someone receiving specific information. Mitkriegen is colloquial and often means noticing or understanding something almost incidentally while events are unfolding. Erfahren is more appropriate for a direct communication, while mitkriegen is typical when something is noticed in passing.

Im Flur kriegte Lea mit, dass das Treffen ausfällt.
In the hallway, Lea noticed that the meeting was canceled.
Direkt von der Chefin erfuhr Lea, dass das Treffen ausfällt.
Lea learned directly from her boss that the meeting was canceled.