There are several synonyms for the phrase "knowledgeable about." Some of these include well-informed, well-versed, acquainted with, familiar with, experienced in, proficient in, conversant with, and skilled in. These words all convey a similar meaning, indicating a high level of understanding and expertise in a particular area. When describing someone as knowledgeable about a subject, you are implying that they have a deep understanding of it and are able to discuss it with ease. It is an important trait, particularly in fields such as education, science, and technology where staying up to date with the latest developments is crucial.