有沒有人可以幫我改一改文法&改通順一點??(英文好的請進)

There have been a lot of different opinions about the traditional public relations . This public relations plays an important role in doing business because of its effectiveness and higher cost efficience in comparision of other marketing functions .
In fact, it has existed for many years and is used as a commercial sort in helping organizations' communications with consumers and people participating in social movements at the beginning of civilization .

Hope this helps !

Although there (are) opinions differ from the origins of public relations, it is “serious business, effective and highly cost efficient when compared to other marketing functions” , and it is generally existed and accepted as helping organization communicate between consumer and social movement by the beginning of civilization itself.

and it is generally existed and accepted as helping organization communicate between consumer and social movement by the beginning of civilization itself.
↓
it existed and is generally accepted as an organization helping communication between consumers and social movement at the beginning of civilization.
------------------------------------
I think it will be better.