After engaging with your brand a few times, chances are people will want to know more and maybe even follow you on their favorite social media channels. There are 3 main areas they will look - top right in the header, sidebar on the right or left of the site, and finally the footer.
Adding icons and a "call-to-action" to your website to make it easier for people to join your community and stay in the loop.
If you have a newsletter signup, you may also want to use a social trigger to entice them to join.
Letting them know how many others are also subscribed can serve as a form of social proof, giving them something of value, or making them feel like they're joining and exclusive group can also help them signup.