Explanation
Yo Dawg is an internet meme that describes an object placed within the same or another similar object, all packed in picture usually with Xzibit picture on it.
It’s adapted from the TV show Pimp My Ride in which rapper Xzibit would pimp out someones ride while often saying something like “Yo dawg, I heard you like video games, so we put a sony playstation in yo car so you can play games while you drive”.
Based on those moments, first parody was developed “Yo Dawg I herd you like cars so we put a car in yo car so you can drive while u drive” and after that many with the same pattern and Yo Dawg meme was created
And here is professional explanation 
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