I would like to improve SEO on a page with three big images, which are currently hosted in the CSS. The sample I am working with is at http://xquisitevents.com/about-us/

and I put my cursor over the big picture of the wedding dress with bouquet, I inspected the element and saw this code in a div tag:

#upperleft {

1. background-image:url(images/AboutTopLeft.jpg);

Can I add an alt tag to the CSS somehow, or can I have it added to the HTML? What is the best way to handle this, to include keywords like

exquisite weddings and special event designs?

I am working with a simple site http://http://lightsigns.com/Uniko_Manufacturing_Limited.html

They seek more SEO traffic. However, the two big headlines that read "Wholesale Supply to the Sign and Display Industries" which is on line 241 and 242 of the source code, its in a p tag, i.e.

<p <span class="webkit-html-tag">style</p <span>="padding-top: 0pt; " class="paragraph_style_1">Wholesale Supply to the

and

<p <span class="webkit-html-tag">style</p <span>="padding-bottom: 0pt; " class="paragraph_style_1">Sign and Display Industries

Likewise, the product titles are in p tags, also. For example, on the Slide-in Light Box product page, http://lightsigns.com/Slide_In_light_box.html , I have done keyword research and no one is using the words slide in light box.Plus, it is also a p tag, ie. line 43 reads

style="padding-bottom: 0pt; padding-top: 0pt; " class="paragraph_style">Slide-in Light Box

If I suggest that they make an H2 tag with SEO-optimized keywords such as Display Light Box - Slide-In LIght Box, would this indeed help SEO?

In summary, is it correct to say that H1 and H2 tags are stronger signals to the search bots of what the page is about?

I am working with a simple site http://http://lightsigns.com/Uniko_Manufacturing_Limited.html

They seek more SEO traffic. However, the two big headlines that read "Wholesale Supply to the Sign and Display Industries" which is on line 241 and 242 of the source code, its in a p tag, i.e.

<p <span class="webkit-html-tag">style</p <span>="padding-top: 0pt; " class="paragraph_style_1">Wholesale Supply to the

and

<p <span class="webkit-html-tag">style</p <span>="padding-bottom: 0pt; " class="paragraph_style_1">Sign and Display Industries

Likewise, the product titles are in p tags, also. For example, on the Slide-in Light Box product page, http://lightsigns.com/Slide_In_light_box.html , I have done keyword research and no one is using the words slide in light box.Plus, it is also a p tag, ie. line 43 reads

style="padding-bottom: 0pt; padding-top: 0pt; " class="paragraph_style">Slide-in Light Box

If I suggest that they make an H2 tag with SEO-optimized keywords such as Display Light Box - Slide-In LIght Box, would this indeed help SEO?

In summary, is it correct to say that H1 and H2 tags are stronger signals to the search bots of what the page is about?