Image is not going to be shown

I've just start using grav and doing a tutorial.
The question is when I print "![Water] (../img/water.jpg)" in my default.md in a folder, there is no any image on the page. I have this text "![Water] (../img/water.jpg)" written on it. How can I display it?
It should be easy to do it as I see in tutorial.

Ideally, images for a post are saved in the same folder as the post. Then you just ![Water](water.jpg). Otherwise the path is resolved as normal. Double check that ../img/water.jpg actually exists.

To be honest, I've just put it image in my folder before read your answered. =)
My error was a space between ![...] and (...).
Thank you for answering)