It doesn’t matter if it’s your business cards, stationary, website or social media, everything should have continuity in brand and message. It sounds like an easy task, but the reality can be a very different exercise.
When you consider all of the disciplines required to produce your brand (Logo, Taglines, Color Schemes), print media and internet based assets, unifying your brand and message requires coordinating designers, developers, writers, graphic artists.
I’ve learned through years of supporting these disciplines that someone must have a sense of ownership of the branding and messaging. If you do not have a champion looking out for your brand, you might consider hiring someone to assure all support staff are well orchestrated.