On page SEO is essential otherwise you are telling Google you don’t want your page to be found. This page will give you more info: http://trevordumbleton.com/website-seo-basics-need-know/
Page titles are essential to get right. You’ve got around 65 characters to get your subject across and get people to click. Google bolds the words that have been searched for so make sure you include likely (relevant) words in a non-spammy way.
Page descriptions are also essential – if you don’t complete them, Google will make them up as it sees fit. You’ve got 156 characters but that includes any date that WordPress puts in, so in practice you’ve only got 143 characters to use.
People generally prefer to see the post date in the results as they know how fresh the data is, even if it’s not something that changes often.
The content of your page needs to deliver on whatever you promised in the title. You can’t bait and switch people and expect them to stay on your site.
Link off to various relevant places on your own site and elsewhere on the internet. Google knows you don’t know everything, so it expects you to include other links.
If you’d like to keep up to date with your internet marketing, I run a weekly tutor group where I’ll train you in various aspects of internet marketing and where you also get to ask questions whether they’re on SEO basics or more complicated issues.
You can find out more here: http://trevordumbleton.com/tutorgroup/
And there’s another video with a few more WordPress tweaks here: http://www.youtube.com/watch?v=wzo4E1WREFw