My parents raised me to be an expert on everything. Of course that is impossible, but in my meager attempts to fulfill that unreasonable burden that they placed on me--until I was old enough to understand the futility of my quest---I did stumble across a lot more knowledge / information than a typical person that was allowed to pursue only the things that he was really interested in would normally come across.
I have ADHD (attention deficit hyperactivity disorder), and a side effect of that is difficulty in producing written output., so composing an "off the top of my head" type answer is laborious and time consuming---although I do so when I give an opinion that is worth that effort. So when I use a Wikipedia type site, I search for information that is true based on my personal knowledge or study and which is also stated in a clear meaningful way---that saves me a lot of time and effort and helps me answer more questions than I might otherwise have time for. I either post a link or generally reference such answers---a link if the answer is given in such "deathless prose" as to merit a proper footnote, or just in general ("Internet," for example) when I found it to be generally available.
And as Jules Vern stated, links to math answers are generally better than typing equations unless it is simply a question of setting up a word problem. I have tutored from elementary through graduate level, and the general rule of thumb was 3 hours of preparation for an hour of tutoring because understanding the needs of the student is paramount in order to tutor successfully. The links given frequently contain interactive graphs, as well as further links that the person asking he question may be interested in.
As for just posting a link, I do that probably 10-15% of the time. Usually that link is specifically chosen by me for having the most useful information---which is not necessarily the first link that pops up during a search. Frequently, just reading the link I provide has either the words in the question in the link or simply is the question restated in a different way for search purposes--for example, someone may ask about urinary leakage, and while I have no familiarity with that problem, I have developed some search skills and found more information under "urinary incontinence." Sometimes pointing out a different approach to finding an answer which will work for the person asking the questions simply is to suggest he approach his information gathering another way.
And in response to Kass Yassin"s answer, I post answers that I think best provide the information the person asking the question is seeking. My concern is not to motivate that person (or any other browser of the site) to want to avail himself of the possibly useful information that might be provided in any link I post.
