SERP

SERP - A search engine results page (SERP) is the list of results that a search engine returns in response to a specific word or phrase query. Each listing includes the linked Web page title, the linked page URL (Uniform Resource Locator), a brief description of the page content and, in some cases, links to points of interest within the website.

There are three main types of results on a SERP:
1) Pages that the search engine spider has crawled and indexed;
2) Pages that have been manually added to the search engine's directory;
3) Pages that appear as a result of paid inclusion.

The highest-ranking hits generally link to the most useful information; links grow less relevant as they move farther down the list.

SEO

SEO - Refers to the process of improving traffic to a given website by increasing the site's visibility in search engine results. Websites improve search engine optimization by improving content, making sure that the pages are able to be indexed correctly, and ensuring that the content is unique. Going through the search engine optimization process typically leads to more traffic for the site because the site will appear higher in search results for information that pertains to the site's offerings.