After you make your model under Blender 3D you can share it with one great addon to this website.
This is my model share with this addon:
To add this addon go to File – User Preferences – Addons and search with this word: sketchfab. Check this addon and the presss Save User Settings.
Make your model with materials , UV maps, textures and normal textures to have a great model.
When your model is finished then press T key to see the left panel and you will see Upload tab (first is Tool tab and the last is Upload).
You need to have a account to the website. Fill with your email adress and then you need to press OK button to get one mail with the Api Key. Because you cannot put with copy paste from your mail to Blender 3D use this tips and tricks.
Copy your Api Key from your mail and open a text into Blender 3D – TextEditor and then use copy – paste to fill the input named Api Key.
With your 3d model then just press Upload and then after few seconds View Online Model button to open browser with your model under sketchfab website.
See this image for setup your Api Key with your token: