A transition or linking word is a word or phrase that shows the relationship between paragraphs or sections of a text or speech. Transitions provide greater cohesion by making it more explicit or signaling how ideas relate to one another. Transitions are "bridges" that "carry a reader from section to section." Transitions guide a reader through steps of logic, increments of time, or through physical space. Transitions "...connect words and ideas so that your readers don't have to do the mental work for you."
In simple terms, a transition word demonstrates the relationship between two portions of the text or spoken language. By using the imagery of a bridge, we can see how these words take us from one statement to another. By using these words we can better build a sentence and convey what we are trying to say in a more concise manner. There is more than one type of transition word. This section will introduce the most commonly used.
The transition words like also, in addition, and, likewise, add information, reinforce ideas, and express agreement with preceding material.