Search engines amass their store of websites by registration or automatic searching. A person that creates a website can go to a search engine and submit the new website address. It then becomes part of the engine's base on which to search. The engines also send out websitefinders called robots to look for new websites. When creating a website one can tell the robot what to use to index the site so it can be found later when potential visitors are searching.
Websites come and go everyday with remarkable speed.
What was there last week may not be there today, the address may have changed and the owners may or may not have left a forwarding address. Be careful of ignored sites. Many sites are put up and never touched again so the information is old. She would like to receive detailed information about conservation courses taught now or in the recent past. It might be a general introduction to conservation, or focus on any sub-discipline.