Forums | MacLife

Hi. I have a site that just went live and I want to plug in the meta tags for description and keywords. This site was completely rebuilt from an old site. So there was a site existing at the same URL. Now when I search under the name of the company at Google the old links come up. Is this something that will eventually change as Google updates or is there something that I need to do to get the new description and keywords to show up when I do a search? Hope this makes sense.
Thanks!