More people are checking in on their favorite websites and blogs from their phones, tablets, e-readers and other devices that aren't laptops or desktop computers. If you want some of that traffic, your best bet is to offer a mobile version of your blog that doesn't make your readers constantly pinch and zoom to get a look at your latest outfit and read your bon mots.
What to do if you don't have the skills or budget to whip up a mobile version of your site? Consider a responsive theme that automatically adjusts based on the size of the screen viewing it. It's not a perfect solution – since mobile connections are often slower than regular computers, you'll want to keep large images to no more than 2 or 3 per page to ensure that everything loads quickly for mobile readers. Responsive themes don't actually change the original image size, so lots of large photos would still take a while, but having a mobile friendly layout is better than nothing.
Google has recommended responsive design as their preferred way of showing mobile content…
Google has recommended responsive design as their preferred way of showing mobile content, so you may get a small search boost from having a mobile friendly theme as well.
For an idea of where to start, consider one of these modern, clean themes that offer a clean slate for customization and highlighting gorgeous images. They're all free, and there's a little more Blogger love with some great options there.
Note: these themes are for the hosted version of WordPress (download from WordPress.org), not WordPress.com