Not everyone will probably notice the tagline and the welcome blurb. Most users will try to guess what the site is first from the overall content of the Home page. But if they can’t guess, you want to have someplace on the page where they can go to find out.
Don’t make me think
Being an expert in online usability Krug gathered his experience in a wonderful book. This summary of key thoughts will help you to remember most important principles and laws.