Extremism refers to holding extreme political or religious views, while radicalization is the process by which individuals adopt increasingly extreme ideals that reject mainstream ideas of freedom and peace. People can become radicalized for various reasons, including exposure to propaganda online. Violent extremism, like terrorist attacks, crosses the line by using violence to promote extreme ideologies. To counter extremism, education about different groups is important, as is discussing any concerns with teachers or family and reporting anything related to extremism or radicalization to the authorities.