We currently have a website which has a fairly high ranking on yahoo and other search engines.. It is currently using an html page as the main front page. I have 2 questions :
1. Will it affect my ranking, if I change my html main page to an asp main page - whilst using the same meta tags ?
2. What does the following line actually do ? Is this necessary for a good ranking (my website does not currently have this) :
<meta name="robots" content="all">
Thanks for any help you can provide.