I'm finalizing work on my blog and I'm putting some content on it before we put whole thing online. Of course, I should split that content into sections, so someone could easly find what they need. My first idea was to have home page, about me, contact, portfolio AND categories - "categories" would be drop down menu with other sub-categories (and that's where I will sort my posts). Now, as I am researching whole thing about it (keep in mind, I am not expert or whatever by any meaning), I've found comments that it is not the best idea, as it is not "search engine friendly". Other comments says that it depends on how whole thing is programmed. My question is: does this really makes any or big difference? How I can learn more about it? Do you have any advices in general with this? Thank you in advance.