What are grapic links?

[electra]

I read some where that in on-page optimization avoid graphics links....but i didn't get that actually what are graphic links ? & why we avoid this?

 

[-Lawrencia-]

Graphic link take you to another page or another site as soon as someone click on that image. In order to link with another page/site you need to add the address of the page you want to go. However graphic representation of link makes your website attractive, but the text in the image cannot be indexed by the spiders. Therefore you should use alt tag otherwise no one will know to click on it or where the link goes