The <title> tag and the meta description describe a page to search engines and to users. The title is a ranking signal and the link text in results; the description, which doesn't influence ranking, serves as a hook and may be rewritten by the engine. Each page must have its own unique ones.
Example
<title>Homemade Bread Recipes</title>
<meta name="description" content="Knead, let rise and bake a crusty loaf.">