Hashtags are not just for Twitter, or Instagram, or even Facebook and LinkedIn. Hashtags categorise content and make that content more discoverable in searches both in your social media channels and on Google. You should think of hashtags as part of your branding kit – to engage your audience around an event you are holding, or for instance, an ad campaign.
How to get the perfect image size for you social media posts. Social media cheat sheet for Facebook, Twitter, Google Plus and You Tube, plus two catch-all sizes