An ad extension that places more than 1 link in a paid search ad. For example, beyond your standard ad copy and call to action, you could add a link to your current sales page or your store hours page. Sitelinks are typically free to use. And just like any other pay-per-click (PPC) ad, they don’t incur a charge unless someone clicks on the link.

Combining Email Marketing with Other Types of Marketing
Whether you choose to do your marketing online or offline, one thing does not change. This is the concept that no single marketing strategy will be as effective as a combination of two or more marketing strategies.