A WordPress theme controls control the look and presentation of the material on your website. View the following WordPress article for further information on installing and managing themes:
Use an online tool to analyze your site
First, use an online tool to analyze your website. You'll receive a breakdown of what may be causing your site to load slower than expected and it will give you insights to troubleshoot further.
Picking a good theme
You should do some research before choosing your theme. Check several reviews of the theme to get a better idea of how other users rate it. The following site is also a good starting point for locating highly rated themes:
Optimize your site
In addition to choosing a good theme, there are also several ways to optimize your site. View the following links for further information: