FWIW can be used more casually by younger users, which may be added to make opinions light or to prevent being perceived bossy because of group conversations. Adults can apply it more formally/mindfully, in particular, in emails or professional discussions. Teens occasionally use FWIW in order to send encouraging or supportive words to their friends. On the whole, the basic meaning is not that different, but tone and context may be a bit different in accordance with age and the level of different levels of familiarity with online slang. Know more about fwiw meaning fwiw meaning