media
Media is a noun, and it is also a plural form of another noun, medium.
‘the media’
You can refer to television, radio, and newspapers as the media.
She refused to talk to the media.
It is usually regarded as correct to use a plural form of a verb with the media, but people often use a singular form.
The media are very powerful in influencing opinions.
The media was full of stories about the singer and her husband.
You can use a singular or plural form in conversation and in less formal writing, but you should use a plural form in formal writing.
‘medium’
A medium is a way of expressing your ideas or communicating with people. The plural of medium is either mediums or media.
She is an artist who uses various mediums including photography and sculpture.
They advertise through a range of different media – radio, billboards, and the internet.