Liferay roles and permissions for publishing -

i new liferay, since there many roles in liferay, i'm in confusion.

i need implement particular scenario like,

admin --> can publish

users(under admin) --> can edit content , make request admin publishing

can 1 explain how implement this

please refer below link detail explanation of "liferay workflow web content".

http://www.liferay.com/documentation/liferay-portal/6.2/user-guide/-/ai/using-liferays-workflow-with-wcm-liferay-portal-6-2-user-guide-02-en