I hope this hasn't been asked before, so apologies if it has (and for those who have answered it in the past and my search hasn't found your answer, please at least link me to the earlier answers!)
My question is simple: I want to improve the overall success rate of Google searches finding my site.
For example, if I do a search of a particular category that I've written about (and use the image search function), I find my site's logo over and over, and not the actual images. How do I change that?
I use Categories only - should I use tags in preference, or both, or does the categories work well?
I have looked at search results for my particular topics, and the result includes a link to WordPress which claims that there are no posts on WordPress about the tag in question. How can that be when WordPress claim that their tags and categories are completely interchangable? Do I need to categorise, and tag, every single post?
I really don't like the fact that WordPress claims a particular topic has never been written about, when I know for a fact that I have, and have categorised it accordingly.
What do I need to do to my images to improve their likelyhood of being found during a search?
Suggestions etc much appreciated.