Home theatre installation involves setting up an immersive audio-visual experience in a dedicated room or space, typically using a high-resolution TV or projector, surround sound speakers (like a 5.1 or 7.1 system), an AV receiver, and various media devices such as streaming boxes or Blu-ray players. Key considerations include choosing a quiet, dimmable room with good acoustics, placing speakers correctly for optimal surround sound, managing clean wiring connections (HDMI, optical, and speaker wires), and possibly integrating smart controls for convenience.