How to add extra text at wordpress homepage?

Sometimes we need to add some very important test at homepage for SEO purpose, say I am running an eyeglasses blog, and I need to add a short description at the beginning of homepage so that google can know the main point. How to do?

<?php if (is_home()): ?>
Do you like discount eyeglasses? Do you want to know how to buy cheap glasses online?
<?php endif; ?>

The the text within <div> </div> with show properly, why not have a try now!