As a research tool, the internet should be approached with caution. It should be a supplement to your academic endeavour and not a replacement for it.
Most people use search engines when looking for information on the web. Google, for example, is very well known - the most widely used and one of the better search engines for coverage and use.
However:
This is true of all search engines. Different search engines will search different parts of the web. Although there will be overlaps they will all unearth some different results.
Have a look at this Quality of Information section from our Library Skills Guide to learn more about evaluating the information you find (use the menu on the left of that section to navigate to the different pages).
Here are some good quality websites specific to Anthropology that you may find interesting or useful...