You'll notice about your Blog post Body box, there are three selectors at the moment 'Real Life', 'Technology' and 'Miscellaneous Tags'. This is where you choose a few words that best describe your post. By using these tags, it will mean that all the content on the site (links, pages, blogs, everything!) can be grouped together by what it contains. The system can then find other documents with similar tags for you. It also helps Google spider the site automatically and groups things together better. So, if you're writing a post more than a line or two (as you would in a comment), then please tag it.
I've included the three main 'Vocabularies' (posh word for groups of tags) and put some example tags in there. For example, select the real life box and press the down arrow. It will then give you some examples. The same on Technology. You can just write your own. For example, there was not a tag 'Tagging' in there so, I wrote one in.
Separate multiple tags with commas.
Please do use this powerful feature and I think you'll reap the benfits of it later.