Help with another text.

Hi, here I'm again. Well, I've made another text, could you please, check my grammar. I did my best in this paragraph, and it would be my introductory paragraph in a essay. Thank you a lot for your help. The next time, I'll post a complete essay.

greetings, doesxp

Here's the text:

Material on the Internet should be censored or controlled to protect the public.
In my opinion, Material on internet should be censored or controlled because many of this information go around without any kind of control. For example, sometimes this informational content has explicit publicity about sexual or illegal themes. Nowadays, a considerable number of children or teenagers have access and surf the Internet, and many times this explicit publicity is easy to find on various web sites. Therefore, it is necessary to control and censor undesirable explicit material that could be injurious to our sons.