Social interactions
You can use social interaction analytics to measure the number of times users click on social buttons embedded in webpages. For example, you might measure a Facebook "Like" or a Twitter "Tweet".
is possible to impletement this feature passing parameters in this exact order
this.$ga.social('Facebook', 'like', 'http://myownpersonaldomain.com')
also possible to pass an object literal
this.$ga.social({
socialNetwork: 'Facebook',
socialAction: 'like',
socialTarget: 'http://myownpersonaldomain.com'
})
Google Analytics docs: social interactions