For questions about non-wired communication in IoT devices, particularly where you do not have a specific protocol or transport in mind.
Wireless communication can use a variety of different protocols, achieving different ranges, bandwidth and reliability. Wireless is generally synonymous with radio communication, but can also be used to include optical networking, and inductive coupling.
This tag should be used where the question is not specific to a certain protocol.
If your question relates to wifi or bluetooth, you should use those tags in preference.