"Recent advances in smashing rocks allow us to build the Advanced Concrete Plant, with double the daily Concrete production of a regular plant. Save time and workers by switching to Advanced Concrete Plants!"
The Advanced Concrete Plant allows you to process Stone into Concrete at a much higher rate than a normal Concrete Plant. Concrete is quite necessary for the more advanced structures available to you once you reach Level 20+, required in practically every building at the higher levels.
Additionally, the Advanced Concrete Plant is more efficient than the regular Concrete Plant. The regular plant converts Stone to Concrete at a 2:1 ratio; the Advanced Concrete Plant converts Stone to Concrete at approximately a 1.5:1 ratio.