viewing saved page on web

i am entirely new to word press, someone else created a website for my current boss prior to me, and now i am in charge of making changes. It took me forever to get to the point of simply finding out about word press, and then leraning about it and now editing pages. So now I am at a dead end. I have edited an existing page and saved it. I can view it just fine on the administrative end, but if I simply go on line and view the web site itself, the changes are not shown, everything is just the way it was before. I have read for hours now all that I can in relation to this, but I have not found anything that explains the problem to me. Can anyone please help me?