WordPress comes with two content types, Pages and Posts and there are a few key differences between them. 

Pages are static and are not listed by date. Pages do not use tags or categories. A Donation page is a classic example of a Page in your WordPress website. Pages can be displayed in the main navigation, a sub-navigation menu and/or footer navigation menu. The URL for a page typically looks like this: http://www.yourdomain.com/page-title/

Posts are entries listed in reverse chronological order on the blog home page or on the posts page if you have set one in Settings > Reading. If you have created any sticky posts, those will appear before the other posts. Posts can be found in the Archives, Categories, Recent Posts, and other widgets. Posts are also displayed in the RSS feed of the blog. You can control how many posts are displayed at a time in the Reading Settings. The URL for a post includes the date the post was published like this: http://www.yourdomain.com/2015/09/22/post-title/