There can be many reasons for communicating through information

There can be many reasons for communicating through information. A purpose could be to create awareness, educate, and change knowledge, influencing perceptions, attitudes and beliefs, promoting action or to change behaviour.
Understanding the audience is fundamental to the success of any message. The sender needs to analyse the audience and then adapt the message to their goals, interests and needs. Audience like to listen to a message that suits their interests, familiar with their level of knowledge and understanding.
Sources of information can be classified as primary or secondary. A primary source will be produced during an event meaning that the information does not already exist. This type of information is gathered by a person directly in contact with the incident or event. Some examples of these would be diaries, letters, interviews etc. A secondary source is a type of information that is filtered through someone removed from the primary event. These sources can be interpreted or analysed literature of the primary source. This includes books, interpretive documents, or an outsider’s account of an event.