When I create a website for my clients, I always by default add the following to the footer:   <div class=websiteBy>       <a href=http://www.example.co.uk target=_blank>Website by<img src=assets/elements/loai-design-studio-logo.png></a>   </div> Is what I am doing actually damaging me or my clients by anyway? I have researched and read few articles but they all are full of arguments and I really don't know which answer is right... also is it true - no-follow attribute need to be added?
Linking to my website from my clients sites
seo;backlinks