In order for your web page to be added to Google or any other search engine, you need to have metadata. Metadata are tags that describe the contents of the page, its creator and some other things that make search engine’s job much easier.
Metadata is usually located in the <head> section of the webpage and looks like this:
<head> <meta charset="UTF-8"> <title>Web page title goes here</title> <meta name="description" content="Web page description goes here"> <meta name="keywords" content="Keywords for SEO go here"> <meta name="author" content="Webpage Author’s Name"> </head>
Author and keywords tags are not shown in the search rults, but help Google understand the content of the webpage better.
There also are other meta tags, like <robot>, which allows you to control the search crawlers. Usually, you should not specify them, since your CMS will do it for you.