1.
Adding Information (to introduce another point): First(ly), Second(ly), Third(ly), Moreover, In addition, Besides that
2. Showing Contrast (to show differences or opposite ideas): However, On the other hand, Nevertheless, Although / Even though
3. Explaining Causes & Effects: Because, Therefore, As a result, Thus
4. Giving Examples: For example, Such as, For instance
5. Summarizing & Concluding: In conclusion, To sum up, All in all, Ultimately