What is the main difference between a complete sentence and a fragment?

michael.taylor

jessica.kemp

sarah.conway

carmen.miranda

lspaeth

kcarrasco

173552e

may.xiong

ms_morgan15

3riklaves

krystle_adams

lezlie.palomo

pamela.perez

sglassell

armanddivenuto

sarah.fagan

smile.alkaabi

sabha-ss.alameri

dbowe50