Many companies today are starting blogs to help boost their SEO results. Blogs can be a great tool to introduce new content to the site in an easy to use fashion and without the resources of a web designer or knowledge of html. One great aspect of these blogs is the comments feature that allows users to post comments about your blog post. This is great because the comments are usually about the same topic as the post and can add a lot of good, indexable content to the page other than the main post.

But there is also a darker side of comments, the spam side. Blog comments are an easy way for people to spam links to their site because many people leave the option in WordPress “on” that auto approves comments. I know there have been many times that I had read a comment along the lines of “Great site, keep it up” or “Just surfed in and I love your site”. Sure they seem harmless, but comments allow the user to post his url and name with their comment. So the above two comments were posted by a person named “Buy Viagra Online” and were actually a link to an online pharmacy. This is not good for your site at all. Comments like this can put you into bad link neighborhoods and associate your site with theirs.

The problem is that not all comments are like this. The option to add your url is so other blogs can link back to their blogs. The idea of comments is great and the rewards of building a solid community outweigh the risks of possible spam. But if you are going to allow comments, you need to moderate them all. Check the users post; make sure it is relevant to the topic of your post and not a generic post. Generic posts can be a sign of an automated posting spider trying to spam blogs with open comments. Check the users name and url; you want to allow them to post their url because it is part of blogging but you should always visit the url a user gives to make sure you are ok linking to that site before approving the comment. Comments are one of the best things about blogging but if you are going to enable them make sure you moderate them properly.

Content freshness is definitely a factor in search engine algorithms. For news items and blog posts, in particular, freshness gives a boost in rankings. Several major search engines have filed patents for gathering historical data about pages so not only is this a current factor but it is likely to be one that search engines will be adapting and improving over time to ensure that their customers receive timely and relevant results.

The big question, of course, is what does this mean to the site owner in terms of updating their content. Is it necessary to update pages frequently to get good results? The answer to this question is: it depends.

One of the main reasons that a site should try to feature fresh content is because it can increase the frequency of visits by search engine spiders. Naturally, if you are updating pages on a regular basis, you want that to be reflected in search engine indexes and you want the search engines to return in a timely fashion so that new information can appear in search engine indexes. Studies in index freshness have shown that, for over 68% of pages, Google requires about two days before the page is visible in the index. Yahoo is quicker – over 50% appear within a day.

However, search engines don’t crawl your site every day unless they have a reason and if they are only coming around every two weeks, this means that a page that you updated today might not appear in the indexes for over two weeks and that’s assuming that they actually accessed the page since they do not access every page every time they come. If your site is publishing timely news items or pages that need to be accessed quickly, content freshness is important. The good news is that these items are inherently fresh. Search engines will notice this and will return often to find your new content.

So, what if you are not publishing news items every day but you still want search engines to visit often? Should you try to change the content of your homepage every couple of days? Optimizing the content of a page so that it will rank well for a key phrase can be an arduous and painstaking process involving a lot of tweaking and experimenting before the page is just right. Changing the content of the page every day just for the sake of change is not a good idea. What about just updating the page by adding a word here and there? This is also not a good idea for two reasons:

1. As noted above, search engines are becoming more and more sophisticated in recognizing real fresh content. This is unlikely to fool them.
2. Updating pages just for the sake of updating may distract search engine spiders from your real new content which could actually prevent them from finding it.

Content freshness is actually one of the best reasons to include a blog on your site. You can take the opportunity to provide your visitors with timely news about your company and industry and even feature the occasional quick link to any new pages that you may have added. A well-written blog post has the advantage of actually being new content. Just make sure you post regularly. A regular pattern of adding new pages of content is the best encouragement for search engines to return on a regular basis.

Furthermore, if you do manage to convince search engines to visit your site regularly, it’s a good idea to make it easier to find those new pages. In other words, don’t update pages just to make old content look new. Only update pages that really do contain new content and then allow search engines to see that the content is new by setting your server to support Conditional Get or the If-Modified-Since request-header field. That way search engines are much more likely to find your new pages when they come and put them into search engine indexes to be found by your potential new visitors as soon as possible.

I admit it; I love the TV show “Vegas”. One of the things I always found fascinating in that show was the facial recognition tool they use in the security room. It is great the way they scan through a database of faces and find a match to someone they just video capped from the security cameras. It’s basically a search engine for faces.

What if everyone had access to this database, what if you could search for a face online or even the opposite, find a face and click it to get detailed info on who it is. Well, you’re not going to have to wait long. A new search plug-in coming from Polar Rose will allow you to do just those types of searches.

The plug-in is due to be launched in beta during the first quarter of 2007 and will be available for both FireFox and Internet Explorer. According to Polar Rose, you will be able to click on a persons face and find out who they are and some data about them or enter a name and see a collection of photos of the person. They claim it will work on any photograph publicly available online. I can already imagine the outcries of the security zealots out there, but that is a topic for another article.

Looking at the big picture however, I think challenging the basic notion of how search works is the most interesting aspect of this new tool.

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