There are very key differences between posts and pages in your WordPress site.
Posts are entries listed in reverse chronological order on the site homepage or on the posts page if you have set one in Reading Settings. 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 site. You can control how many posts are displayed at a time in the Reading Settings.
If you want your posts to appear on a page other than your home page, see Front Page.
See Manage Posts for more detailed information.
Pages are static and are not listed by date. Pages do not use tags or categories. An About page is the classic example. Pages can be displayed in the sidebar using the Pages widget, and some themes display pages in the navigation at the top of the site.
See Manage Pages for more detailed information.
How many can I have?
There is no limit on the number of posts or pages you can have.
How do I post to a Page?
All posts will appear on the main posts page, but you can also display specific posts on category pages with our custom menus feature. If you want, you can change the default page for posts to appear by changing Reading Settings in the Dashboard. This will likely require changing your Front page as well.