Another reason is that if you're using an image as a link, the alt text for that image will be treated similarly to the anchor text of a text link. However, we don't recommend using too many images for links in your site's navigation when text links could serve the same purpose. Lastly, optimizing your image filenames and alt text makes it easier for image search projects like Google Image Search to better understand your images.
Spider-driven search engines such as Google®, Yahoo!® and MSN® use "robots" or "crawlers" to score websites across the Internet. Robots "spider/crawl" each site and "score" pages based on how relevant they are. A website's score or placement within a spider driven search engine is derived from hundreds of variables such as link popularity, density and frequency of keywords in page content, HTML code, site themes and more. You will want to focus many criteria in your SEO strategy to position yourself well among the major search engines. Here are two of the most influential factors:
What kind of advice would you give is your site is growing but seems to be attracting the wrong kind of traffic? My visitor numbers are going up but all other indicators such as bounce rate, time page, pages per visit seem to be developing in the wrong direction. Not sure if that’s to be expected or if there is something that I should be doing to counter that development?
As of 2009, there are only a few large markets where Google is not the leading search engine. In most cases, when Google is not leading in a given market, it is lagging behind a local player. The most notable example markets are China, Japan, South Korea, Russia and the Czech Republic where respectively Baidu, Yahoo! Japan, Naver, Yandex and Seznam are market leaders.
If you are using Responsive Web Design, use meta name="viewport" tag to tell the browser how to adjust the content. If you use Dynamic Serving, use the Vary HTTP header to signal your changes depending on the user-agent. If you are using separate URLs, signal the relationship between two URLs by tag with rel="canonical" and rel="alternate" elements.