Today, even big businesses are using options like social media portals to get in touch with their global audience, using Facebook and Twitter plus several other solutions to spread the word about their brands, e-stores and online services. There is one argument and that is use of such services might not have directly any impacts on the SEo statuses of domains because usually not a lot of incoming links might be gained through taking part in such activities but they are strong from traffic aspects.
In other words, if your Facebook or Twitter pages get accessed by thousands of eager readers and visitors on a monthly basis, most of those individuals will be visiting your homepage as well, and naturally, your overall traffic shares will improve considerably. It is suggested to use a combination of methods like SEO, investing in paid advertisements such as PPC programs and at the same time post updates on social media sites because they all can help maintain a popular web portal.