All Web pages are composed of parts we can see in our browser (visible contents) and parts don't see in our browser (invisible contents). One feature of the web that has helped it grow so quickly is that anyone can display the invisible parts (web code) by simply Right Clicking their mouse on the page and selecting "View Source". This action should open a window on your computer to reveal the guts (code) of the page.
In the top section of most web pages (there are some exceptions) should be several HTML Tags that help Search Engines rank a page for topical relevance. Specifically, the TITLE TAG, DESCRIPTION TAG, and KEYWORDS tags should be included and coded within Search Engine Friendly guidelines. A common mistake is for these elements to be completely left out of your web page design or coded in a way that Search Engines don't like. To see if your pages have been done within recommended guidelines, we like this free tool on the web at Scrub The Web.