Very much depends on the speed of loading of the site to not pay attention. Consider the basic elements that determine the speed of the site.
1. the size of the images. Before you can place images on the site, be sure to optimize their weight. Also the icons, images in the site template.
2. Caching Plugins. If we talk about vordpresse, the most popular plugins series is W3 Total Cache and Hyper Cache. They significantly affect the speed of loading pages.
3. engine upgrade to the latest version. Do not neglect updating, as in more recent versions are correct critical errors.
4. reduction of plugins. Of course, trying to work a plugin you want, but don't use them all for their blog. Their total number may delay the loading of pages and if you notice that the plugin is decreasing speed, some of the plugins you want to delete.
5. check the code. Header & footer in particular can contain a large number of garbage code, you want to remove.
