I have a question about Backward Links (I think that is the term) to my site and how Google view this. I am a web design company in Portland, Oregon and am interested in being found for the keyword phrase "Portland Web Design". Many of my clients kindly provide a link back to my site that says "Website Design by Gravitate Design Studio". We have created 100's of sites that have this exact text linking back to us. I have a couple of questions:
1. Should I use slightly different anchor text in these links? I don't want to do anything spammy, but maybe just have my company name in the URL and the words "Website design" won't be part of the link.
2. Typically, I place this link at the bottom of each page in a client's site as part of the copyright footer. Does it matter if I have links from every page, or is it better to have it from just one?
3. Since many of my clients sites have nothing to do with web design, do I get penalized by Google for having these links, or do they simply give it little weight?
4. I provide links in my portfolio to many of my client's sites, and they link to me. Does Google view this as a link exchange. I don't want to do anything weird that would get any of us penalized.
Anyway, thanks in advance for any info that you might have.