Ashik Ahammed Hridoy presented on breadth-first search (BFS) to Tanzim Tamanna Shitu. BFS is an algorithm used to search tree or graph data structures by investigating all nodes at the current depth level before moving to the next depth level. The presentation provided an example of applying BFS to a sample tree, showing how it sequentially searches nodes by adding them to a queue in breadth-first order. It concluded by mentioning JavaScript can also be used to implement BFS.