Here’s a good rule of thumb for websites: keep it simple, say things only once, and link to things sparingly. Less is more with the web; keep pages sparse to increase the chances that visitors will learn what you want or take the action you want.
Sometimes this guidance breaks down with links, especially when you consider that navigation and other template elements as links on the page. Don’t be tempted to add the same link multiple times to make sure it is noticed – the resulting additional clutter may ensure it does not get seen at all!
According to the smart people at Nielsen Norman Group, redundant links are a bad idea most of the time for these reasons: