In very simple terms, a Responsive WordPress Theme is one that will look good on any screen where it is viewed. The above image is how the Free WordPress Sequential Theme displays on 3 different viewing screens.
After a painstaking search for the theme that would best serve my needs, I have elected to use Sequential for most of my blog sites.
I posted a brief review of the Free WordPress Theme Sequential Here
I recently tried several themes, and I was mortified at what happened to some of my images even on my 17-inch laptop. In the same way that your symptoms disappear when you go to see a physician, I looked for an example of that photo fiasco just now, and I could not find one. Trust me. The unresponsive themes do wicked things to the content that you take great pains to post so that they look “right.” I took the time to look at some of my posts on a variety of different screens, and the results were shocking.
People who read my blogs know that my mantra is:
A Picture Is Worth 1,000 Words, and when an unresponsive WordPress theme dissects one of my images, I am not happy. That does happen on the unresponsive themes.
I am in the process of reviewing all of the Free WordPress Responsive Themes Here
It will be a while before I have completed that research, but trust me again in saying that there are many, many Free Responsive WordPress themes. Why blog in any other way?