Page titles - don't make a website without them.
Every page you make for your website should have both a meta-tag and a page title. The page title is just a short description for your visitors and for the search engines to identify the contents of the page.
Many search engines use the page titles to display the search results....so don't leave them out.
A page title is at the top of your HTML code, and looks something like this:
<title>Internal SEO -- Page Titles</title>
The secret to using page titles right is to keep them short and sweet. Don't use filler text , and/or/how/when, etc. Keep it focused on your targeted keywords that you got from your keyword research.
Your keyword research should be a factor in your meta-tag writing and your page titles both.
Planning before starting to make your website can really help you identify a internal linking structure and linking method for your site that shouldn't be overlooked.