What is the difference between “in between” and “between”?
What is the difference between “in between” and “between”?

for example:

A table is in between the chairs.
A table is between the chairs.

which one used often? or it depends?

Question

What is the difference between “in between” and “between”?
What is the difference between “in between” and “between”?

for example:

A table is in between the chairs.
A table is between the chairs.

which one used often?  or it depends?

Answer

In the example you wrote, there is no difference.  I'd prefer the simpler version using just "between," but both are correct English.