If you use a content management system (cms) and don't know how to access these elements, it is worth the call to your development team to figure out how, and do what it takes to get you access to customize each of these hotspots uniquly.
Title Tag. This is the title of a specific web page. It later becomes the blue underlined link in search results like at Google, Bing and Yahoo. It is also used at social networking sites such as Facebook when someone is sharing a link to that page.
Meta Description Tag. This is a description of a specific web page, and should be treated as a marketing tool. It may show up in search results, depending on the keyword term being searched.
Ignore "meta keywords." No point anymore. If an SEO firm says they are going to fill those in for you, you might as well be paying them to eat rice cakes. They can still display in search results, but have little value.
Linked text on the page. When appropriate, link text in your article to relevant pages on your website, or on an exterior website.
Images. Use images when you can, and fill in their alt attribute. This was originally created for web users who have images turned off, or can't see the image for some reason (broken file path, etc), and words are displayed in its place. These words describe the picture.