One of my clients has asked me to add logos and links for FaceBook and Twitter to her website. I cannot to see any advantage in doing this except that her Facebook and Twitter accounts might then provide one external link each for SEO. If someone on the forum can explain any advantage that might result from the Facebook and Twitter links, I will change my mind and add the links to her website. I have no need for these fads as I am extremely busy and and can do without extra chores. I know the purpose of SMs is to trawl for personal details and preferences for sale to advertisers, other than that I am completely ignorant concerning Facebook and Twitter (as you probaly guessed). I discovered that websites can advertise themselves on Facebook but the cost is not disclosed by Facebook. Your advice would be most welcome.