valid links to the pictures...

Hey hello!!! everyone!! it might not concerns this forum, but where can I find an website like
valid links to any pictures? I don't know what it means!!! can one of you guys please
show me!!!any website?? please!! cause the designer who's making a poster and a background for me is driving me
so crazy!!!!!!
thank you very much!!!!

kk all you have to do is:
make a new post,
then click the *host an image* button (it's under the italic button at the top)
then u select file and click *browse*
and select the pic you want from ur computer
after that you click the *host it* button
and u copy-paste the SECOND link they give yooh onto ur post~ and that's pretty much it~ <3
hope it helpedd ur question wasnt too clear xD