I like the start of the guide, the items, runes and spells, as well as the matchups. I suggest expanding a little more on the item section, to clarify in which order you buy certain items, in which situations, etc. You should definitely create an explained item section.
Same goes for runes, explain in which situation you have to take either one of them.
The grammar in your guide isn't right most of the time, english isn't your first language is it? I'm not trying to be mean with this, I know how hard it is to learn english, I'm from Chile so I had to learn it too. Maybe ask someone for help with this, even I could help someday.
The order of the sections on your guide is a little bit strange,I think the note about you, as well as the pros and cons should be at the beggining, then add the sections I said before, and then the game and tips and tricks. It would be nice if you also explained jungle routes more in depth, and things like that.
I know it seems hard to code a guide, but it's actually quite easy, and most things dont take much time. The colored titles are appreciated, maybe try to add more things like that. There are a lot of guides about coding on mobafire, and they are super easy to follow. I can recommend you some.