“Attribution (BY) Licensees may copy, distribute, display and perform the work and make derivative works and remixes based on it only if they give the author or licensor the credits (attribution) in the manner specified by these”.
“Licensees may copy, distribute, display, and perform the work and make derivative works and remixes based on it only for non-commercial purposes”.
“Share-alike Share-alike (SA) Licensees may distribute derivative works only under a license identical (“not more restrictive”) to the license that governs the original work. (See also copyleft.) Without share-alike, derivative works might be sublicensed with compatible but more restrictive license clauses, e.g. CC BY to CC BY-NC.)”.
So, basically, people are free to use, copy and distribute info they find on this site as long as they attribute the author(s), don’t use it commercially and don’t distribute it under other terms than these.