Ethnography means 'writing about people' (or 'drawing about people'): closely connected to anthropology, it is the study of people's actions and experiences in everyday situations that results in a rich, detailed and holistic picture of that group.
In terms of research, ethnography fundamentally involves fieldwork, i.e.researching in context, being immersed in the fluid situation you are studying, and having prolonged, direct experience of what you’re researching.
This approach provides you with a first-hand and comprehensive picture of your subject - you can observe what Bronislaw Malinowski called 'the imponderabilia of actual life'; everyday details, ordinary behaviours, rituals, social relationships and interaction, human stories.
The methodology of ethnographic research (i.e. the overall research approach) is known as participant observation: you observe, participate in, and record the everyday activities of social groups. This can involve making fieldnotes, taking photographs or video, interviewing people, running workshops, as well as visual methods like drawing and sketching. It can involve participatory and collaborative methods - e.g. getting subjects to make their own drawings, collages, photo-stories, video diaries, mood boards, maps, storyboards, self-portraits etc.