We recommended that all of the images in your website should have a resolution of 300ppi (pixels per inch). If this is not possible, you may need to enhance your images (we recommend using Adobe Photoshop), or you may even need to retake the images. Another thing that you may want to consider is to scale your images down, which will help the resolution.
For more advice or for any queries, please feel free to contact us. At Redback Creations, we help to make high quality websites, and we can help increase the quality of yours. Get in touch to see how we can help your business today.