...from WIKI...
The practice has been both praised and criticized.[7] Adding daylight to evenings benefits retailing, sports, and other activities that exploit sunlight after working hours,[9] but can cause problems for evening entertainment and other occupations tied to the sun.[10][11] Although an early goal of DST was to reduce evening usage of incandescent lighting, formerly a primary use of electricity,[12] modern heating and cooling usage patterns differ greatly, and research about how DST currently affects energy use is limited or contradictory.[13]
DST clock shifts present other challenges. They complicate timekeeping, and can disrupt meetings, travel, billing, record-keeping, medical devices, heavy equipment,[14] and sleep patterns.[15] Software can often adjust computer clocks automatically, but this can be limited and error-prone, particularly when DST protocols are changed.[16]
If politics or business has a hand in it... it is meant for their good, not ours.
The world is mostly (vertically) divided into timezones. We/I here in Saskatchewan, Canada... have no problem going on with our lives, not using Daylight Savings Time.
I guessing this was somehow thought of, for business to gain from it.
Seriously......... nothing changes in my life, because I'm in a province that refuses to use DST.