‘Get the picture’ is an expression that Americans often use in everyday conversation.
Literally, it means “understand the picture,” but its actual meaning is “understand the situation” or “know what I mean.”
It is usually used to check whether someone has understood the overall context after hearing an explanation, or to see whether the other person is following along while you are explaining something.
It can also be used casually in formal academic conferences or presentations, and it is effective for conveying the nuance of “Do you understand so far?” to the audience.

3 everyday English examples
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So now do you understand how things are going? → Do you get the picture now?
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Do I need to keep talking, or do you understand what I mean? → Do I need to keep talking, or do you get the picture?
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After I explained why he was angry, he finally understood what was going on. → After I explained why he was upset, he finally got the picture.
3 academic conference and presentation English examples
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Since I have explained up to this point, I believe you now have a sufficient understanding of the research background. → At this point, I believe you get the picture of the research background.
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Looking at this data, you will get a sense of why the treatment effect matters. → Looking at this data, you can get the picture of why the treatment effect matters.
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In summary, you will be able to understand the overall picture of how new approaches to hair loss treatment are evolving. → To sum up, you can get the picture of how new approaches in hair loss treatment are evolving.