301 redirect = “moved permanently
302 redirect – “moved temporary”

According to recent tests:

301 passes 90-99% of link value to new URL
302 passes almost no value
Javascript or meta refresh redirects pass no link value and sometimes are unreliable for search engine redirects.

Takeaway:
– If you have pages that moved or need redirect make sure to use a 301
– You may have to talk to your ISP about setting one up correctly depending on your server’s configuration
– Do not ignore this, as the link value is essential to helping your SEO efforts
– If you are confused, call and ask! (your ISP provider)

Why a 301 redirect