We cant tell you how many you should include, because that is totally up to you. But if you meant what is the maximum amount of words that you can use on the page title, well, there's no limit on page title's word counts anyway. So you can include as many as you want. However, increasing the number of words will increase the size of that particular post. And size of posts will indirectly contribute to size of pages. Check out the following article from google help article. Size of Posts: Individual posts do not have a specific size limit, but very large posts may run you up against the page size limit. (See the next item.) Size of Pages: Individual pages (the main page of your blog, or your archive pages) are limited to 1 MB in size. This will allow for a few hundred pages of text, but it may be a problem if you are listing hundreds of posts on the front page of your blog. If you hit this limit, you will see an error message saying "006 Please contact Blogger Support." You can get around this error by lowering the number of posts on your main page, which will have the added benefit of making your page load faster as well. Hope this helps.