Both have low value, but some information about them is useful to know.<br /><br />ALT<br />only for Internet Explorer<br /><br />TITLE<br />only for Firefox (maybe others, too)<br /><br />You should use both of them at images.<br /><br />I believe you are talking about SEO for images. For ANY image you should do this:<br /><br /><a href="link"><img alt="text" title="text" src="link" id or class or style></a><br /><br />Even if the influence is low, this order is important.<br /><br />Use a caption at any image.<br /><br />Any image should be linked to the same or bigger image. Better to a new page with the image and again a caption. Use title of the page and H1 for heading of picture:<br /><br /><title></title><br /><h1></h1><br /><br />Picture<br /><br /><h2>Caption</h2><br /><br />alt, title and caption(s) must be exactly the same text. (100%)<br /><br />If you want to improve position in Google Image Search, it is helpful to set links to this picture. If you set links to the page with the same or bigger picture, you can redirect this page later with 301 to the article with the linked picture. Of course then you should delete the linking.<br /><br />As you know, pictures with higher resolution CAN BE more relevant than with lower.<br /><br />Some SEOs say that picture should be at top of the page. In the upper third. But this depends on using all of a. m. ranking factors or less.<br /><br />Any questions?<br />