Domain Lock-In: Savvy technical people will tell you that the right way to move a website or blog from one domain to another is via what is called a “301 permanent redirect”. In lay person’s terms, what this means is that you setup a clean forwarding address from your old site to the new site. By using this approach, you don’t lose any of the search engine love you’ve pulled together. Guess what: Google does not let you do a 301 redirect from your old site to anywhere else if you’re using blogspot.com as your domain. Let me repeat this. If you currently have a blog that is something like mybusiness.blogspot.com and you build a ton of inbound links to the site, Google does not let you redirect that SEO value to a new site (like your company website). This is a Very Bad Thing. Not enough for me to call Google evil, but enough for me to at least think it.
clipped from: blog.hubspot.com