What kind of signals does the search for extraterrstial intellingence look for?

The search for extraterrestrial intelligence (SETI) primarily looks for radio signals and laser emissions that could indicate the presence of advanced civilizations. Scientists focus on narrowbandwidth radio signals, which are less likely to be produced by natural astrophysical phenomena, as well as optical signals in the form of pulsed laser light. Additionally, SETI researchers analyze patterns or anomalies in data that might suggest artificial origin, such as repetitive sequences or unusual frequencies. Ultimately, the goal is to detect signals that signify intentional communication from intelligent life beyond Earth.