Difference between different type of PDCCH messages


I am unable to understand the difference between different types of PDCCH messages. I know we have TYpe0, 0A, 1,2 and UE specific.

Now, I understand UE-specific PDCCH is for particular UEs, while others are for broadcasting information. However, I am unable to understand the difference. Any help would be appreciated.

This picture will make you understand better

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