Templates are of course the main reason why people choose Joomla! as their content management system. The possibility to change your web site with just a click of the mouse to select another template is really great, but it has to be used with caution.
Changing your template every month is not a good idea, you will frustrate the frequent visitors of your web site. They have to find their way through your site again, even if you keep the modules and menus at the same position. So, stick to your template for a longer time if the number of your visitors are rising and you see that there are a lot of returning visitors.
In a search engine optimized template, you should look for the following items that we talked about in this chapter:
Valid W3C compliant XHTML and CSS coding
Fast loading template images
Free of hidden and non-relevant links
Clean coding
Source code optimized to improve the probability to easily find the content for Search Engine Robots
Use of typography
It cannot be stressed...