PAGES are found above the header, on the top of the page. It depends on which theme you have chosen, but some themes do not have pages visible. You will need to go to dashboard> appearance> widgets and drag over the Pages widget to your sidebar. PAGES usually have information that doesn’t change very often. You won’t use PAGES very often.
POSTS on the other hand are published on the main part of your blog in reverse order, so the newest posts are at the top of your blog. Eventually a post will disappear off the front of your blog – you will still be able to find it by clicking on older entries. The POST is the common option when publishing content.