According to my textbook
Concentration of anodic half cell increases and that of cathodic half decreases when two electrodes are joined by a wire.
I have also read that it is connected with a Salt bridge which prevents the flow of the electrolyte ions and supplies the required cation or anion (from the inert electrolyte in the salt bridge) and overall its electrically neutral . Then how they can state that concentration increases in one half cell only ,that is both cells are provide with sufficient ions ? Please correct me if I am wrong somewhere in understanding the concept.