A quick explanation of Posts and Pages
Posts are listed by date, think of them as magazines, the most recent one is shown first. Posts are usually used as blog articles but can be used for many different types of content (This support article is a post). Pages are static, they aren’t sorted by date. Think of pages as books, they contain static information. About page, contact page, etc are Pages.
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.
If you want your posts to appear on a page other than your homepage, you can use the page builder blog module to add posts to a page.
Pages are static and are not listed by date. Pages do not use tags or categories. An About page is the classic example.
How many can I have?
Only the Coverpage plan is limited to 2 pages and 2 posts. There is no limit on the number of posts or pages you can have with any other plan.