Thanks for your question, Sylvia. According to the authors, the term technoference was coined by McDaniel and Coyne (2016) and refers to interruptions in interpersonal interactions or time spent together due to technology. This can include sending texts or emails, checking your phone or social media, and even picking up a phone call or answering a text during a conversation with your child (although this is not limited just to the parent-child relationship but to other relationships in your life as well).
Hope this answers your question!