MQTT = Binary protocol

Hi guys! I’m following the recommendation of post here my “technical question” instead comment on YouTube video. So, after watch the MQTT Essentials - Part 2 video on YouTube, I was thinking about the content and just couldn’t understand clearly the idea that MQTT is a binary protocol. What makes MQTT classified in this way?
Thanks in advance.

Hi Bruno,

Glad to see you are a part of the Community Forum now!
Binary protocol in this context means that the data exchange happens within binary messages (containing of bits).
A different approach would be HTML for example, which is document centric.
Let me know, if you are looking for additional clarification.

Florian from the HiveMQ Team.