With younger and younger children using Social Media and the Internet, Dorothy thought some sensible advice might come in handy for her readers.
The Internet is a fantastic place, where you can find out almost anything! Unfortunately, the search engines (like Google) don't know how old you are, and when you search on the internet, you might not get back results which are appropriate for you.
Your parents will probably have downloaded some software to keep you safe - it might slow down your online experience but it is worth it. Believe me, there is some unpleasant stuff out there. Just like when you go to a bookshop, you would search in the appropriate section - software like Norton Internet Safety tries to keep you in the right section of the Internet.