Social media is increasing in importance for researchers. For details of some of the key tools available and how they can be used in research have a look at Social Media: A Guide to Researchers, compiled by the Research Information Network.
Using social media to communicate and collaborate with other researchers can be investigated using tools such as ResearchGate.
You should also consider using webpages, blogs and micro blogging (e.g.Twitter) to make research interests and outputs more widely known.
As you collaborate more widely you face the challenge of distinguishing your research activities from those of people with similar names. ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers.
The ORCID Registry is available free of charge to individuals, who may obtain an ORCID identifier, manage their record of activities, and search for others in the Registry. ORCID records hold non-sensitive information such as name, email, organization and research activities.