WordPress out of the box is already technically quite a good platform for SEO, this was true when Joost wrote his original WordPress SEO article in 2008 (and updated every few months) and it’s still true today, but that doesn’t mean you can’t improve it further! This plugin is written from the ground up by Joost de Valk and his team at Yoast to improve your site’s SEO on all needed aspects. While this Yoast SEO plugin goes the extra mile to take care of all the technical optimization, more on that below, it first and foremost helps you write better content. Yoast SEO forces you to choose a focus keyword when you’re writing your articles, and then makes sure you use that focus keyword everywhere.
SEO Friendly Images
SEO Friendly Images is a WordPress SEO plugin which automatically updates all images with proper ALT and TITLE attributes for SEO purposes. If your images do not have ALT and TITLE already set, SEO Friendly Images will add them according the options you set. Additionally this makes the post W3C/xHTML valid as well.
ALT attribute is important part of search engine optimization. It describes your images to search engine and when a user searches for a certain image this is a key determining factor for a match.
TITLE attribute play lesser role but is important for visitors as this text will automatically appear in the tooltip when mouse is over the image.