Most of the computers in our world today have monitors or screens that can display millions of pixels. As technology has improved, so too has the display resolution of these screens, to a point now where less than 5% of internet users have screen resolutions smaller than 1024 x 768 pixels. Similarly, most styles in the Sitebuilder are designed to support a minimum screen resolution of 1024 x 768 pixels.
Yola styles don't control the maximum width of your websites though, so there could be cases where the content and images you add could exceed the styles recommended width. When a visitor to your site is using a 1024 x 768 screen, and your site is running at a width greater than the styles recommended width of 1024 pixels, your visitors could be faced with a horizontal scrollbar because the entire width of contents of your site doesn't fit within their screen's resolution.
We would recommend that your site content not exceed a 1000 pixels in width - to accomplish this, always test your site at a 1024 x 768 resolution, or use such services as: