title: HTML : load thumbnail image and full image faster
body: <p>I have a blog website that loads the images slowly i want to know how to make them load faster and:</p>
  
  <ul>
  <li>I am using same image for thumbnail and story. thumbnail is small,does it still load full image?if so how to use thumbnail of an image?</li>
  <li>Where should i store the images? what is the best location to store images for your websites and blogs? can save them in one drive and use the source?</li>
  <li>how to optimise images?what is a placeholder?i have seen many websites such as facebook use a kind of place holder which displays before image and content?how to do so?
  -how to i preload images ? or is there any better way ?</li>
  </ul>