In this video, Annemarie explains the significance of using linking words in English for efficient speech. She explains that using linking words provides clarity and creates flow in language, which assists listeners in following a speaker's train of thought. The video lists five uses of linking words, including creating sequences, expressing conditions, and highlighting comparisons or contrasts. The video then provides eight ways of using linking words to create smooth transitions in English while speaking. Finally, Annemarie advises practicing regularly and suggests choosing a topic of interest, creating a mind map, and practicing speaking with linking words to improve English communication.