What is the application of transformer?

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<div id="bcenter"> <div> </div> </div> <div> <div id="center_col"> <div id="taw"> <div> </div> <div> <div> </div> </div> <div id="tvcap"> </div> </div> <div id="res" role="main"> <div id="topstuff"> </div> <div id="search"> <div data-ved="2ahUKEwihoM73yIjsAhWqwTgGHTAnCugQGnoECBYQKA"> </div> </div> </div> </div> </div> <div data-hveid="CBQQAA" data-ved="2ahUKEwihoM73yIjsAhWqwTgGHTAnCugQjDYoAHoECBQQAA"> <div> <div> <div> </div> </div> </div> </div> <div data-md="32"> <div data-hveid="CBQQAg" id="media_result_group"> <div> <div data-count="1" data-hveid="CA4QAA" jsmodel="gpo5Gf"> <div> <div jsaction="PdWSXe:h5M12e;rcuQ6b:npT2md" jscontroller="IkchZc" jsdata="X2sNs;;Ab860w" jsmodel=""> <div data-h="130" data-nr="1"> <div data-attrid="image" data-docid="RIqv1JkxhNj3tM" data-lpage="https://www.electricaltechnology.org/2012/02/uses-and-application-of-transformer.html" data-ved="2ahUKEwihoM73yIjsAhWqwTgGHTAnCugQzkwoAHoECA4QAg" jsaction="rcuQ6b:npT2md;h5M12e" jscontroller="E2Spzb" jsdata="XZxcdf;RIqv1JkxhNj3tM;Ab8600" jsname="dTDiAc"><a data-ved="2ahUKEwihoM73yIjsAhWqwTgGHTAnCugQ9QF6BAgOEAM" href="https://www.google.com/search?q=What+is+the+application+of+transformer?&sxsrf=ALeKk00WMIobsAOgBJvtr1vT0h8C43hZGQ:1601183386150&tbm=isch&source=iu&ictx=1&fir=RIqv1JkxhNj3tM%252CqfxiXP_UdBFBZM%252C_&vet=1&usg=AI4_-kTfKHV4pKHCyU3R9-DlzMI8XWCO_A&sa=X&ved=2ahUKEwihoM73yIjsAhWqwTgGHTAnCugQ9QF6BAgOEAM#imgrc=RIqv1JkxhNj3tM"><g-img> <div> </div> </g-img></a></div> </div> </div> </div> </div> </div> </div> </div> <div data-md="61"> <div aria-level="3" data-attrid="wa:/description" data-hveid="CBQQAw" role="heading">The main application of Transformer is to Step up ( Increase) or Step down (Decrease) the level of Voltage. in other words, Increase or decries the level of Current, while Power must be same.</div> <div aria-level="3" data-attrid="wa:/description" data-hveid="CBQQAw" role="heading">Transformers are commonly present in circuit breakers, where they utilize a switch to automatically interrupt the flow of electricity and to prevent damage that can occur as a result of high voltage. The concept of battery charging is fuelled by the functioning of generators.</div> </div>