First, do not waste money for paid and fake followers. Then stick and maintain certain social media platform by using hashtags and URLs. When using social media, make sure you do not oversell. Stick to your brand and limit what you share in social media.
When followers comment or tweet, comment or tweet back. Do not ignore them as they are your potential clients. When investing, make sure you measure the result of your effort and how you perform.
Source: Business 2 Community