Miro review

Usually it serves as an online writing board, for when a notepad isn't enough and drawing becomes necessary. In my work, this happens in two cases: (i) drawing business problem frameworks and issue trees and (ii) conducting team building dynamics online where "post-its" are important.
The business problem Miro address is the necessity of having a shared document with more freedom of scope that Google Docs, Sheets or Slides can't offer. Also, it doesn't bug with large groups of people as these other tools do.

The tools or features that have impacted my day to day the most was (i) the simultaneous editing, (ii) the easy-to-make fluxogram tools (the one where you click a box and the next one appear already conected by an arrow) and (iii) the "follow" participant feature (where your screen follows the one of a specific participant you choose).

No, it haven't. It is what I said previously: in the few use cases I use it I find it great, but I haven't brought myself to include in my work routine yet.