If I got 200 unique visitors daily or atleast 15 clicks daily on my ads, then how much can I earn at the end of the month.
That is a MIGHTY big if, however if your content is good enough to pull in that many visitors on a daily basis then we can plug some numbers in, though they are not encouraging reading..
200 unique visitors.. ok, lets assume that they each look at 10 pages of your site that all carry Google ads
that's 2000 or so 'page views' - for which google will pay you a little under 1cent
(incidently , they don't pay out on the account till you reach $50 dollars)
The amount paid out for for actual clicks on ads varies wildly, use the free google adwords tool
https://adwords.google.co.uk/select/KeywordToolExternal
this shows what people are paying for those adverts to appear and working backwords gives some idea of how much you might get and for many it is only 10 to 15 cents per click from experience.
And Now a word of caution..
Do not click on your own ads, get friends or family, or ask anybody else to for that matter.
Google are not stupid, All the tricks have been tried, unsuccesfully I might add.
Keywords & Meta tag stuffing, unnesescary page refreshes, hidden text, cash for clicks offers, bots, 'mechanical turk' teams, all to no avail.
If Google catch you trying to deliberatly skew the results, you WILL forfiet the rules of the TOS and lose any money you may of earned.