Changing the Excerpt length of a post

When you write a blog post, your blog should be able to display a small excerpt length on the main blog page, and then the entire article is linked to the shortened excerpt. When the ‘read more’ button or link is pressed, the reader is taken to the single-post page that is indexed and linked to the excerpt article – the entire article is then displayed in full on the single post page along with any media such as videos and images on that page. I hope this helps to explain a basic core functionality of a WordPress blog.