Yes, linking multiple breadboards together throughout your project can be helpful.

BPS full-length BreadBoards (BB830, BB1660, BB630, BB100R) can be used side-by-side using the interlocking dovetail connector on each end and half-length BreadBoards (BB400, BB300, BB50R) can be used side-by-side as well as top-and-bottom. This is a convenient way to expand your working area without rewiring.

There is also a modular breadboard product line (BB830M, BB400M, BB1460, BB1560M) that allows you to easily detach the power rails and circuit areas to snap different combinations together for your project needs.

Keep in mind that the power rails do not connect automatically when the boards are snapped together. The strips on each board are electrically independent. If you want a continuous power rail across multiple boards, add a short jumper wire bridging the rails at the join.