- Use short filenames; do not try to fit an entire sentence in the filename. - Avoid Session IDs and ID variables.
Texts inside Images
- Avoid long informative texts inside images as search Engines cannot crawl graphical pictures.
Excess JavaScript
- Keep JavaScript to a minimum. - Avoid JavaScript redirects and hidden links.
Inline Frames and Frames
- Keep frames to a minimum. - Some search engines may not rank pages inside a frame.
Hidden links / texts
Avoid hidden links/texts. If the user cannot see the link/texts, it will be considered as spam.
Cloaking
- Search engines will penalize your website if cloaking is found. This is when one content is provided to search engines and a different content is provided to web users.
Duplicate content
- Avoid duplicate content from other websites. - Search engines will usually place the oldest website that had the duplicate content first. - Search engines like original and unique content.
Understandable Content
- Ensure your HTML Code is understandable by most web browsers. - You can always download a range of browsers and ensure your website appears right on all of them. - Majority of search engines cannot read Flash movies. - If you have flash on your website, provide an HTML version.