I want to know it..... 
Certainly.
Firstly, plasma televisions utilize many small cells containing phosphor/ionized gases which are used to produce the pictures/movies/etc. that we see. Now, when plasma TV's are mentioned, most people immediately think of the dreaded "burn-in". For those of you who don't know, burn-in is when a bright, still image is present on a TV for too long and causes it to be permanently "burnt" into the television display. For example, if you watched a Breaking Bad marathon, the AMC logo in the bottom of the screen may have the chance to be burnt-in. In which case, if you changed the channel to something like ESPN, you would still be able to see the AMC logo.
That was the past. Currently, burn-in is pretty much a non-issue (On most newer model plasma TV's) The issue now is "image retention". Image retention is basically the same exact thing as burn-in with the only difference being that image retention is only temporary. Now, with image retention most, if not all, new plasmas have a feature called "pixel orbiting", or something similar (Every TV brand name calls it something different, pixel-orbiting is on Panasonics) Pixel-orbiting slowly shifts the pixels one-by-one in an attempt to combat image retention. From my experience with my TV, I have left pixel-orbiting on and have not noticed it working at all. Additionally, I have seen no image retention in the slightest, even after long GTA V sessions (Think of the GTA map and how long it stays on the screen).
It's important to know that plasmas (Just like all TVs) need to be broken in. Most say that the "breaking in" period for plasmas is between 100 and 150 viewing hours. Image retention/burn-in is most likely to occur during these initial hours and if you make it past this point, there is little need to worry.
Another common misconception is that plasma TV's do not last as long as LED/LCD TV's. Most new LED/LCD TV's will have an estimated lifespan of 100,000 viewing hours. My new plasma has the same lifespan of 100,000 viewing hours. It is true that at one time plasmas died before even reaching 50,000 viewing hours, but technology has advanced significantly and this is certainly no longer the case.
Finally, most people think that plasmas consume substantially more power/electricity than LED/LCD TV's. This point is true; however, in my opinion, it is not a concern. The average 46" LED LCD TV consumes roughly $16 worth of power/year based on 3 hours/day of viewing. My 50" plasma consumes roughly $40 worth of power/year, also based on 3 hours/day of viewing. This is a valid argument, but I'm fine with paying $24 more for the great picture I get.
Of course there are pros and cons and another person may tell you that plasmas are not the way to go. Plasmas may not be as bright as LED TV's (Although mine is plenty bright) but they have the deepest blacks and the best contrast for viewing. Just some of what I've learned. Please feel free to ask any questions or comment.