Why image optimization needed?

[satty]

In Image Optimization with the relevant key words we use effective techniques to attain high rankings on different search engines.
Some of the ways are

ALT text is important from the web browser point-of-view and specially for the google crawlers. I would like to highlight one thing that the ALT text downloads faster than the image.
Suppose due to some of the specific reasons your image is not being displayed or may be your browser does not support images, so you need to specify the keyword in the ALT text which enables the viewers and crawlers to know what the image is all about even if the image is not downloaded.
It is preferred to name the files rather than having random names that appear by default. For example: – use ‘mobile seo-tips.jpg’ rather than ‘DC.jpg’
Use in Text Link

[Jashandeep10]

I do agree with Mr.Satty .Image optimization reduce our SEO efforts to give a rank to a website.

[ghazia]

Originally Posted by satty

In Image Optimization with the relevant key words we use effective techniques to attain high rankings on different search engines.
Some of the ways are

ALT text is important from the web browser point-of-view and specially for the google crawlers. I would like to highlight one thing that the ALT text downloads faster than the image.
Suppose due to some of the specific reasons your image is not being displayed or may be your browser does not support images, so you need to specify the keyword in the ALT text which enables the viewers and crawlers to know what the image is all about even if the image is not downloaded.
It is preferred to name the files rather than having random names that appear by default. For example: – use ‘mobile seo-tips.jpg’ rather than ‘DC.jpg’
Use in Text Link

Good information. One more tips to be added to the above tips.
Don't use large size(file size) images, this may increase page's load time.

[fizzer]

In image using alt tag, we can get more benefit. With doing Image optimization, we can get maximum benefit while in searching. Thanks for sharing with us.

[willsondany]

In case of e-commerce, product reviews, online shopping sites the alt tags you use for images helps you more in ranking pages, they are only way to use your keywords as you can not add description in your content.

[SamDenial]

Yes image optimization is also important in SEO to index your website and images in search engines.

[theavi]

Search engine spiders can not read the images if image is not alt tagged so use alt tag to properly optimization of images and put definition of image their for proper understanding to user and crawlers both.

[MontiC]

Alt tag makes easier to read, crawl and index your web images in SERP. If you have done some quick and solid SEO with your site images they have more chances to be visible in top results on relevant keywords.

[Daniel Michael]

Because it helps a little bit when it comes to SEO. And one thing I've learned when it comes to SEO is that every little bit counts. Marketing is complicated but if you follow a certain guideline you will be fine.

[aaron70]

If your site has lot of images, you need to optimize them too as they can’t be read by the search engines. It’s very easy for a human reader to interpret the image into its meaning. However for a Web crawler the whole interpreting process is completely different. Search Engine spiders can only read text but not images. Crawlers are unable to read images and the flash part of your web page but these images or flash is required to influence the visitors. Thus Optimize this images with suitable contents using Alt tags which reflects your proper business.