Molecular communication (MC) employs molecules or nanoparticles as information carriers, offering a novel approach to communication with applications in fields such as the Internet of Bio-Nano Things (IoBNT), healthcare, and environmental monitoring. Motivated by the limitations of traditional electromagnetic-based communication at the nano- and micro-scale levels, MC enables energy-efficient and biocompatible communication in environments where conventional technologies may struggle. Identification techniques, including deterministic and randomized methods, are explored to enhance message recognition and reliability in event-triggered scenarios, which are common in MC. Experimental setups play a vital role in advancing the understanding of MC systems, ranging from air-based testbeds that utilize molecular propagation through airflow to liquid-based systems that employ chemical signals in fluidic channels. These platforms facilitate the study of the MC channel, sources of noise and error, and questions related to implementation. By addressing the challenges in integration, scalability, and security, MC has the potential to transform future communication technologies and meet diverse application needs.