Need to be enlighten with this

Thanks for reading this thread I just downloaded the plugin Worktime and I want to add some features. Here is the flow:

If the user clicked the WorkTime menu, the worktime will be displayed and there will be a button that if you click it, it will then proceed to another page.

here is my code in the controller:

def showall   @eskietest = "test" end

In my view:

<%= @eskietest%>

So I expect that it will display "test" message but there is no display If I will change the code from <%= @eskietest%> to <%= :eskietest%> then the "test" message will appear. Please explain to me why. Thanks again.