Social learning via social media platforms require specific considerations, as the purpose is to generate discussions around particular topics to enable learning.
Whatever the purpose of your social learning needs, you do need to build a community on the social media platform first. Once this is going, the rest will fall into place. There is no time frame, some will take off quickly, others will need time. You will want to introduce the flavour of social learning from the outset – to “set the scene”.
Taken from my article
SOCIAL LEARNING STRATEGIES FOR SOCIAL MEDIA PLATFORMS