Remove Comment Tags - Keywords in comment tags could be construed as spam. So remove unnecessary comment tags from your source code. I came across a webpage that included multiple header tags and keywords in a comment tag. This is not recommended.
Another one had several hundred lines of HTML code hidden in a comment tag. Such code is not executed, so it's simply a waste of space and download time. Make a backup of the page, and remove the unused code from the published webpage.
Alternative Text - Don't use more than one ALT (alternative text) attributes in IMG (image) tags.
<IMG SRC=image.jpg ALT='keywords, more keywords, blah…'
ALT='keywords2, and more keywords, blah, blah…'>
In addition, only use one keyword phrase in ALT attributes. I came across ALT attributes that included almost 50 words, or over 300 characters.
- Tiny Text - Minimize the use of FONT SIZE=1 tags. Better still, use FONT SIZE=2 or larger. I came across a webpage that used FONT SIZE="-6" .' Font sizes range from 1 to 7, with 3 being the medium. So a '-6' is clearly asking for trouble.
- Duplicate Links - Don't include too many text links to the same URL on a page. I came across a home page that had 12 identical text links, all pointing to the same URL. There were 58 links in total on the page, so 1 in 5 links were identical. That's far too high a ratio. Don't use more than two or three identical links on a page.
Fix Broken Links - Check for broken links. Relative links are the most common culprits.
These links may work fine on your computer. But it doesn't work when you upload it to a server.
- Remove Hidden Spammy SEO Code - If you've ever used a third party to optimize your webpages, examine the HTML source code for suspect SEO spam techniques. Pay close attention to the bottom of the page. This is usually the area where bad search engine optimizers add spammy SEO code, such as hidden links and text. If you find any, remove them from all your pages.
To help you, switch on the 'Display a notification about every script error' feature in your Internet Explorer web browser.
You can find it under:
Tools > Internet Options… > Advanced > Browsing > Display a notification about every script error (check the box)
- Avoid Text Links In Header Tags - I suggest that you do not include text links inside header tags at the very top of the page - the rest of the page is OK. I have seen sites that used this technique get penalized by Google. When the code was removed from the pages, Google reinstated the webpages in its index.