The title of the paragraph
This is a paragraph. Click edit and enter your own text. You can make changes like making the text bold, underline or italic.

General Page Settings
General page settings.
Published - toggles page status: published / draft. Draft pages can only be viewed as Admin or with a preview link, they are not included in sitemap and navigation.
Show in Navigation - toggles just that, being in the navigation menu or not.
Page Type - One of three: Page, Folder or Link.
Page Name - [can not be empty] - How it will show up in the navigation menu.
Permalink - [can not be empty] - part of the page url.
Support Right-To-Left - will auto detect RTL language and adjust text direction.

Page SEO Settings
This is important.
Page title - Will override the default (Name | page name).
SEO Description - Describe the content as if you're talking to someone.
SEO Keywords - Useless these days.
Open Graph Picture - Will override site-wide picture.
Open Graph Title - Will override site-wide title.
Open Graph Description - Will override site-wide description.

Page Keywords Overview
This is an informative view , the distribution of words in the textual content of the page, including headings, paragraphs and photos metadata (ALT values). No recommendations here, you should know what to do with this info ;)