Importance of alt image tag in seo

The alt tag is the HTML tag that displays a floating caption when a visitor
hovers the mouse over an image.

The image could be your logo, an illustration in an article, or anything at all. (Remember: Try to use
only text links. If you do use graphic links, use an alt tag on each one.) The
alt tag is embedded in the HTML image tag, and looks like this:
You can include other tag elements in the image tag, such as dimension elements
that size the image. I excluded such elements for simplicity in the
example. For convenience and consistency, place the alt tag as the final element
in the image tag.
The content of the alt tag varies according to the graphic it’s captioning. In
the case of a site logo, be sure to use keywords. This is where you can place the
site description that Google ignores when it resides in the description tag.
Earlier in this chapter I described how to look at the meta keywords of other
pages. Now it’s time to create your own. Unlike the description tag, the
keywords tag is important to Google — though, admittedly, less than it used
to be. The meta keywords tag has been devalued as an optimization point
for all engines, thanks to the abuse it suffered for years. Stuffing this tag with
keywords is the easiest of all optimization tricks, so Googlebot now takes the
tag with a grain of salt. Still, the spider does take it.
Pour your keywords into the meta tag, but don’t spam it. Do not place more
than three instances of a word in this tag, including instances in which the
word is part of a key phrase. Look again at the sample keywords I contrived
for the fictional site The Coin Trader

coins, ancient coins, collecting, collections,
collect, hobby, coin trader, coin trading”>
Use keywords that might be missing from the page’s content, such as specific product names, geographical locations relevant to the business, and common misspellings of your core keywords. The keywords tag can fill in gaps that potentially clarify details of your page’s targeting or give it an edge over competing pages.

Merely duplicating the keywords embedded in your content is
futile because search crawlers (including Google) are increasingly harvesting
your page’s topical information from page text.
Although I didn’t include three-word key phrases in the example, don’t hesitateto use them in the meta tag. (Separate them from other words and
phrases by commas.) According to a research report in mid-2003, 45 percentof all searches are for keyword phrases of three words or more. Never forget the point of this tag and the obsessive keyword focus throughout your

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