Uninformed search algorithms traverse a search space without any additional information about the state or structure. The document describes several uninformed search algorithms: - Breadth-first search expands all nodes at the current search level before moving to the next level. It is complete but uses more memory. - Depth-first search prioritizes exploring paths fully before backtracking. It uses less memory than breadth-first search but may get stuck in infinite loops. - Depth-limited search limits the depth of depth-first search to avoid infinite paths, making it incomplete but avoiding excessive memory usage.