What is Hot Linking?

In the webmaster community, "hot linking" is a curse phrase. Bandwidth is the amount of data (information) being sent from the host server to the visitors computer. Each text letter, image, web page, and so forth is all really a bunch of data. A visitor comes to your web page, and all the data for displaying in their browser is transferred into their computer. Bandwidth theft (or hotlinking) is when someone else's site is linking directly to an image (or something) on your site instead of downloading the image and uploading it to their own server.

This may not sound like a problem, but in some cases it can be a big one. Imagine you made an image and 100 other sites coded THEIR pages to find that image on YOUR hosted area. If it was just your page alone, the bandwidth data transfer would be very small. Now that a hundred other sites are using the image on your server, that data transfer amount has just gone through the roof. Although this may not impact your site itself, your host server will be bogged down with all this extra transferring. Thus they may make you pay more dollars for hosting and/or cut you off entirely!

I'm sorry dear Miki for this...but, it's the first time that I'm asking this...
about hotlinking, as I do it a lot (I do it in my last post, actually...)
Is much better if we save first and then upload the image from photobucket???

Yes.
Saving and then uploading it onto your own hoster is the way.
Photobucket is free ( http://photobucket.com/ ), so everyone, please do use it.