Here we will go over the Advanced SEO Options. To learn more about SEO, please see the full article here: The SEO Built-In Feature

Change Freq: This drop-down informs the search engines how frequently the content of the page changes, and assists in calculating suitable times for page crawling.

Revisit-After: What we write here will tell the web-crawlers when to re-index the page again. For example, to tell the search engine’s bots to re-index once a week we write 7 days.

Pragma: This meta tag is used for caching, meaning storing a web page locally. It ensures that secure https pages can't be stored. By not using the pragma html tag, it doesn't influence your ranking with the search engines.

A valid entry here would be: no-cache

Content-Language: This tag defines the natural language of the page being indexed. Search engines which index websites based on language often read this tag to determine which language is supported. This tag is particularly useful for non-english and multiple language websites.
 A valid entry would be: english

Audience: This tag defines your target audience. This meta tag is often used to let the younger web-surfers know the content is appropriate.
 Example: general, mature, restricted, safe for kids.

This meta tag has no influence on your search engine ranking unless you use it the wrong way.

Classification: This tag allows you to classify and categorize your website. Go from specific classifications to more general. Try to keep this one under 120 characters.

Key-Phrase: Here we write the phrases to match the desired search query. We need to make sure the phrases are relevant to our page in order for it to appear in the correct search results. Phrases are combination of keywords, like: creative traveling, outdoor activities.

Author: This tags gives credit to the person or company that created the website. This meta tag has no influence on your search engine ranking.

Google Conversion Code Label: This is used for Google AdWords. You can also paste in the required code to the Add Code section in Pages & Navigation.

Priority: This tag defines the priority of the page relative to other pages in your site. Valid values range from 0.0 to 1.0. This value does not affect how your pages are compared to pages on other sites -- it only lets the search engines know which pages you deem most important for the crawlers. Default is usually 0.5 or 0.8.

Robots: This tag gives instructions to search engine crawlers.
 Example: index, follow

GoogleBot: Here instructions can be given specifically to the google engine crawlers.
 for example, we can write “noarchive” in this field. Now google is not allowed to display cached content.

Allow-Search: Here you can put either yes or no whether you would like search engines to to index and follow your site. It's not necessary if you already have the above tags.

Target: This tag can be used as a duplicate of the Keywords tag. It is not necessary to add both, as this tag is no longer widely used.

Copyright: This tag allows you to add copyright over the content of the site. This meta tag has no influence on your search engine ranking.

Canonical: A canonical tag specifies the source URL (or original content page) of a given page to a search engine. Canonical tags are used to declare a single page as its own source or for duplicate pages to reference their originating page. If you don't have a page with the same content, leave this field blank.

Google Conversion Code ID: This is used for Google AdWords. You can also paste in the required code to the Add Code section in Pages & Navigation.

Google Site Verification: This is used to verify your site with Google. You will need to verify your site when using Google Apps or Google Webmaster. Choose the HTML tag option, and enter the code found between the quotation marks.
 Here is example code they would give you to add to your site: <meta name="google-site-verification" content="String_we_ask_for">
 You would paste in this: String_we_ask_for