One of our clients is ADP, the payroll company. The other day we noticed the email signatures that their recruiters have. This is a great way to help spread the word about your company’s social media endeavors.
Use it. To not do so is a complete waste of a free marketing tool.
One of the best practices in recruiting with social media is to promote those links to your user base. That means embedding these icons/links/pages wherever you advertise or connect with candidates.