So you may find one thing that in OR operation only when both the inputs are 0 the output is 0 but is any of the input is 1 the output is 1.
Now let us apply this logic in digital circuits. In circuit 1= flow of signal pulse and 0 = floe of no signal. Your concept of Boolean OR operation will be clear as you will follow the switch circuit in fig. 1
In the above figure there are two switches connected in parallel. Now see as I have told earlier that 1 = flow of signal and 0 = no flow of signal, in this circuit if either of the switches is closed the there will be an output but if both the switches are opened no output will be received. This logic is exactly equal as in Logical OR operation. Here when s1=0 and s2 = 0 the output is also equal to zero. But if either of the ones is closed i.e either S1 = 1 or S2 = 1 or both are equal to 1 then output will have a signal pulse which is equal to Boolean OR operation or called **OR operation**.

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