achacko said:
What about sites relating to careers, education , etc. Which is better.?
My guess is that the difference is a matter of frequency.
Jobs, careers, education, etc. are also very important and very high-price items. Except that you don't get involved with those matters on a daily or weekly basis. Whereas it is quite common to check stock prices, buy or sell stocks, read about them, discuss about them often several times a month, if not per week.
So in terms of traffic or business volume, I would imagine that financial sites get orders or magnitude more visitors and business (and thus more steady advertising dollars) than job sites.
That said, any high-dollar-amount transaction with reasonable frequency is desirable. Careers, jobs, education, etc are therefore profitable sectors.
Similarly, hotels, travel, tours, cruises, etc. are profitable sectors with higher traffic (I expect) than careers, education, etc.