The rule that Tv plays in election campaigns relates to how a party leader comes across to viewers this is referred as televisual image which is how a leader comes across to voters on TV
Social media is increasingly popular even with politicis for example labour used viral videos among young Facebook users to promote and demonstrate how the party can circumvent traditional print
UKIP used social media to each out to voters in 2015 on Facebook and spent most of its campaign money on this
Conservatives halved their spending on Facebook advertising