What term describes informal social networks of professionals with similar work-related activities?

The term that accurately describes informal social networks of professionals engaged in similar work-related activities is "communities of practice." These groups are typically formed around shared interests or professions where members come together to collaborate, share knowledge, and learn from one another. The members may not be in the same organization, but they connect through their professional experiences, challenges, and expertise related to a specific area of work.

Communities of practice emphasize the importance of social interaction and the exchange of ideas among members, which fosters a culture of learning and skill development within a specific domain. This term encompasses the collaborative nature, shared objectives, and collective intelligence that characterize these networks, making it a fitting choice.

Other options, such as communities of professionals, communities of interest, and communities of knowledge, do not fully encapsulate the concept of a practice-oriented network where members engage in shared activities and continuous learning through participation and interaction.