[kbelder]

Per https://stackoverflow.com/help/licensing:

    As noted in the Stack Exchange Terms of Service and in the footer of every page, all publicly accessible user 
    contributions are licensed under Creative Commons Attribution-ShareAlike license as follows:

    Content contributed before 2011-04-08 (UTC) is distributed under the terms of CC BY-SA 2.5.
    Content contributed from 2011-04-08 up to but not including 2018-05-02 (UTC) is distributed under the terms of CC BY-SA 3.0.
    Content contributed on or after 2018-05-02 (UTC) is distributed under the terms of CC BY-SA 4.0.

[lebed2045]

what does it mean in simple words? as one of many StackOverflow contributors (although very small) I don't want that my answers were wall-guarded by SO website, they are free to use advertising revenue from traffic generated by my content to remunerate for creation and supporting the platform, but the content itself is mine, why it shouldn't be that way?