Hello Lavanya,

The purpose of Mass Media(Media and communicatio) is :

Its means a technology that can be use to reach large number of audience.The most common platform are newspaper,magazine,radio and TV.Public generally use mass media for political issue,entertainment news and so on.

The purpose of Mass Communication is :

It is process through which an organisation sends information through various channel.It channels include TV broadcast,social media and print.Examples advertisers and PR.

Hope I helped you.All the best for future endeavour!!