Pages: Using media tags from Media Manager do not work

[evcom]

I am trying to embedd images that were uploaded via the media manager in the Pages Application. 
When inserting the media tag, e.g. {media="3"}, then the image would not be displayed on the relevant page. 

When adding the tag to a page created by using "Manual HTML", the the path the image is shown on that page, but no image. 
When adding the media tag into the WYSIWYG editor, then just the tag code {media="3"} is displayed in frontend, but no image. 

I must be doing something wrong somewhere. Using the latest 4.4.7 Version. Any idea whats wrong? Thanks for any pointer!
 

[opentype]

It’s not meant to be posted in the editor. It’s a template tag meant to be used in templates. 

If you want to show the URL the media tags contain as image in templates or custom pages, you do something like <img src='{media="3"}'>

[evcom]

Thanks opentype, that clarifies it. The guidance here let me believe it's also possible to use the tag in combination with the editor.