Social media platforms can help your search ranking in search engines. Linking back to your website on your social media pages provides a good source of exterior linking to your site. Even better is having social media pages that are not directly owned by you link to your website. These are seen as independent authority domains that think your website has something to offer their visitors.
Social media pages also give you external contact to potential customers. They have search features on those sites as well that you can leverage to your social media posts linking back to your website. You gain a unique opportunity to get in touch with customers and potential customers in building your brand and creating trust. You should focus your social media efforts on engaging your customers with interesting content, promotions (if relevant), and polls and conversations that will increase their affinity for your brand. AND if you offer potential customers a good experience they should link back to your social media pages and/or your website.
Social media pages also give you external contact to potential customers. They have search features on those sites as well that you can leverage to your social media posts linking back to your website. You gain a unique opportunity to get in touch with customers and potential customers in building your brand and creating trust. You should focus your social media efforts on engaging your customers with interesting content, promotions (if relevant), and polls and conversations that will increase their affinity for your brand. AND if you offer potential customers a good experience they should link back to your social media pages and/or your website.