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salam every one, this is a topic from google web master centrale blog: Posted by Susan Moskwa, Webmaster Trends Analyst

Our search quality and Webmaster Central teams love helping webmasters solve problems. But since we can't be in all places at all times answering all questions, we also try hard to show you how to help yourself. We put a lot of work into providing documentation and blog posts to answer your questions and guide you through the data and tools we provide, and we're constantly looking for ways to improve the visibility of that information.

While I always encourage people to search our Help Center and blog for answers, there are a few articles in particular to which I'm constantly referring people. Some are recent and some are buried in years' worth of archives, but each is worth a read:

1. Googlebot can't access my website
   Web hosters seem to be getting more aggressive about blocking spam bots and aggressive crawlers from their servers, which is generally a good thing; however, sometimes they also block Googlebot without knowing it. If you or your hoster are "allowing" Googlebot through by whitelisting Googlebot IP addresses, you may still be blocking some of our IPs without knowing it (since our full IP list isn't public, for reasons explained in the post). In order to be sure you're allowing Googlebot access to your site, use the method in this blog post to verify whether a crawler is Googlebot.
2. URL blocked by robots.txt
   Sometimes the web crawl section of Webmaster Tools reports a URL as "blocked by robots.txt", but your robots.txt file doesn't seem to block crawling of that URL. Check out this list of troubleshooting tips, especially the part about redirects. This thread from our Help Group also explains why you may see discrepancies between our web crawl error reports and our robots.txt analysis tool.
3. Why was my URL removal request denied?
   (Okay, I'm cheating a little: this one is a Help Center article and not a blog post.) In order to remove a URL from Google search results you need to first put something in place that will prevent Googlebot from simply picking that URL up again the next time it crawls your site. This may be a 404 (or 410) status code, a noindex meta tag, or a robots.txt file, depending on what type of removal request you're submitting. Follow the directions in this article and you should be good to go.
4. Flash best practices
   Flash continues to be a hot topic for webmasters interested in making visually complex content accessible to search engines. In this post Bergy, our resident Flash expert, outlines best practices for working with Flash.
5. The supplemental index
   The "supplemental index" was a big topic of conversation in 2007, and it seems some webmasters are still worried about it. Instead of worrying, point your browser to this post on how we now search our entire index for every query.
6. Duplicate content
   Duplicate content—another perennial concern of webmasters. This post talks in detail about duplicate content caused by URL parameters, and also references Adam's previous post on deftly dealing with duplicate content, which gives lots of good suggestions on how to avoid or mitigate problems caused by duplicate content.
7. Sitemaps FAQs
   This post answers the most frequent questions we get about Sitemaps. And I'm not just saying it's great because I posted it. :-)

Sometimes, knowing how to find existing information is the biggest barrier to getting a question answered. So try searching our blog, Help Center and Help Group next time you have a question, and please let us know if you can't find a piece of information that you think should be there!

this is a topic published in 2013... to get contents for your blog or your forum, just contact me at: devnasser@gmail.com

salam every one, this is a topic from google web master centrale blog: this is a topic published in 2013... to get contents for your blog or your forum, just contact me at: devnasser@gmail.com

Seo Master present to you: By Stephanie Liu, YouTube APIs and Tools Team

The YouTube APIs team had so much fun at Google I/O that we thought it was about time to have our own event at our office in San Bruno. (Check out the announcement on the YouTube API Blog for a video of the office.) This will be all YouTube APIs, all the time! The agenda is still being finalized, but we'll have "bigger picture" sessions as well as nitty gritty hacking time to get started and learn best practices. You'll have time to mingle with a diverse set of developers from different companies and the YouTube engineers and product managers.

If you're interested, here are all the details:

Thursday, July 10, 2008
10:30am - 5:00pm (tentative)
YouTube HQ @ 901 Cherry Ave. San Bruno, CA 94066
Cost: Free

Please reserve your spot and register early at Powered By YouTube.

Already have questions, comments, or session suggestions? Let us know in the forum. Hope to see you here next month!2013, By: Seo Master