It is well known in the seo world that if you change your meta tags two things can happen. Number 1, It can takes weeks for Google and other search engines to update your new titles and descriptions and during that time. Number 2, it is possible to lose all ranking until search engines update their website information (Note: this only occurs if search engines think the website is a new website with different content).
Through a lot of years of doing Search engine optimization I have learned the fastest way to get Google to update your websites information with the shortest possible wait time. The trick is very easy to do, you just resubmit your sitemaps(or submit your sitemap for the first time.. for people who have not made a sitemap) in Google webmaster and Bing Webmaster.
If you do not already have a webmaster account, then go to http://www.google.com/webmasters/ and create an account. Once you create an account and login and then go through the website verification processes, you will see a list of websites you have added to the webmaster website. » Read the rest of the entry..

Google base, also known as Froogle, is an over looked resource for traffic and product sells for an E-commerce website. Products listed with Google base are typically displayed on the first page of search results in a box labeled Shopping Results. Sometimes these ads are places at the very top of the search results under Adwords.
If you have low end, cheap hosting package, then the simple answer is, go with right sidebars.