Your organization, with ISO 9001:2015 clause 4.2, determined relevant interested parties and their relevant requirements and/or expectations. So, considering those relevant interested parties, your organization should determine what needs to be communicated to each party (internal or external) in terms of the quality management system. For example, your organization may want to communicate process performance to employees, or quality test results to clients or environmental information to the local community. For each “what to communicate” your organization should plan (I use a table):
when to communicate – once per month? once per year? Every quarter?
to whom communicate – clearly state who will be the recipients of communication
how will you communicate? – a newsletter? An internal meeting? An e-mail? A press release? An internal report? A blog post?
who will communicate? – Which function or functions will be responsible for the communication?