Microphones for the most part are uni- and omni-directional. Uni-directional microphones pick up sound directly in front of where pointed, while omni-directional microphones pick up sounds from all directions.
Wireless microphones can be challenging in the digital marketing and video marketplace because there are so many used by a variety of groups, i.e. government, police, fire etc. The Audio Engineer needs to be able to tune the wireless microphone to the location where they are transmitting.
A hard-wired mic for webcasting events, such as the Shure system, gives the audio engineer top flight reliability.