The MSN blog has been really interesting lately. It’s been interesting watching a new revamped search engine come online because the blog has been giving us insight on how it’s working.

Today they talk about how they index the internet and why a site may not be in their search results.

One is because they may not be able to crawl your site effectively (making it an invisible site) or possibly you’ve spamed them. What does MSN consider spam?

…here is a quick refresher: dirty javascript redirects, stuffing alt text, white on white links, off topic links etc. We take this stuff very seriously and we are continuously working to improve our spam detection…

So check it out, and go and don’t spam!