By bundling MSN search in Windows, many Internet users will be searching via MSN search engine option, so you will want to add MSN search optimization to your list of priorities.
Like Yahoo search engine, MSN search engine gives more importance to on-page factors like keyword density, title tags, description tags and keywords in the URL.
But it seems that the keywords is most important factor in MSN optimization and not only the keyword density in your webpage but the keywords in the title tag and in the description tag and in the URL, but be careful when using keywords because your website may be penalized by Google so use them wisely.
A good technique in MSN search engine optimization is to place your important keywords in the title and the URL of the website.
MSN search engine prefers that every page have a unique title and description.
If your keywords in the page title and description and URL and content matches then your website will do well in MSN search engine.
While MSN search engine pays more attention to on page factors, don't forget to get some good incoming links.
MSN search engine gives more importance to the anchor text of the incoming link more than the link itself, so try to have your important keywords in the anchor text of the incoming links
MSN search engine will also index the pages in your forum component in your website and will index your blog.