It is important that we watch on how, when, where or why when using devices and social media. Children look up to those whom they trust/ in what they do. If one is not wise in using a device, the younger ones will do the same act without knowing it is right or wrong. It is important for the future as well, because it will reflect the example we set before the younger ones whether good or bad and it will show why they do what they do. Some tips to tell younger kids about setting their reputation online is to be careful who they talk to, be kind and nice, don't say profane words, be careful where they go, and more. Another advice is to ask them if their friends, family, everyone, etc. would like or approve what they doing online and if it benefits their future in any way. Hope this helps!
