The document discusses linking words, also known as connectors, which are used to link ideas within sentences and paragraphs. It explains that linking words have various functions such as comparing information, making comparisons, and adding explanations or reasons. Using linking words improves English language skills by allowing more complex expression. Specific linking words like "and", "also", "in addition", "besides", "furthermore", and "moreover" are defined and examples of their uses are provided. Proper understanding and use of linking words is important to avoid changing the meaning of a phrase or causing confusion.