What is Guerrilla Usability Testing? – Long Answer
Guerrilla usability testing is an agile way of testing a prototype or website to get high-level feedback or identify potential UX issues, at various stages in the project life cycle. As there is no formal recruitment or need for expensive research facilities, this method is quick and easy to set up and can be conducted anywhere (this could be a coffee shop, library, park, etc). You would normally test between 6 -12 users, but this will vary depending on what and where you are testing. Just as you would in any lab-based usability test you should make the user aware of who you are and the purpose of the test. If you are going to record the sessions, you will also need to get consent for this.