Can you give us a bit more information about your site? What platform is your hosting? There are numerous variables that impact speed, many of which are platform dependent.
In today's image world, one of the most frequent causes of slow sites are huge images. Even the best optimized site cannot deliver large images efficiently. If you are using GoCentral or the website builder the first place I would look is your images.
Hope this helps,
Many Points Consider Including like Image Optimization, CDN, Fastest Hosting etc. If you struggle with Low Speed read this article for Fastest Website loading speed.