As SCN explains, in addition to Science Communication many other terms are often used interchangeably for similar activities, including Public Engagement, Public Understanding and Outreach, although they all have slightly different emphases. In their view:
Public Engagement aims to engage the general public in two-way scientific conversations, usually about shared issues and problems, to hopefully benefit society as a whole.
Outreach activities are usually seen as public lectures, activities and workshops to encourage the public understanding of science and scientific research and are also often used to encourage school children to take up STEM study in higher education, or to support more formal education.
and, Public Understanding of Science (PUoS) as the definition used by NIDA.