If you are into Cybersecurity, especially Social Engineering, you have probably come across OSINT, which stands for Open Source Intelligence. In this course, we will try to lay a good foundation on going forward with the subject. Firstly, we will go through what OSINT is and who actually uses it. Then we will go through the ethics and moral/immoral side of it and in the end how people use OSINT since it is a thing that people use on the everyday basis without even knowing what they (we) are doing. Maybe you are a business that just wants to find out more about your competition or you met someone on an online dating site and you are interested in finding out more about them. There is also the “other” side of OSINT that is used as a process-stage of a cyber attack.