What transition is suitable to be place before the word or?

the word "or" itself is a transition

http://grammar.ccc.commnet.edu/grammar/transitions.htm

The word "or" is a conjunction. Be sure to read through the different lists as you scroll down this webpage to see what you think would work well.

To determine the transition that is suitable to be placed before the word "or," you can consider the context and meaning of the sentence. There are several options available, such as:

1. "However": This transition indicates a contrast or contradiction between two ideas. For example, "She could choose to stay at home, or, however, she could go on vacation."

2. "Alternatively": This transition suggests another choice or option. For example, "You can either take the train or, alternatively, rent a car."

3. "Moreover": This transition adds information or emphasizes a point. For example, "He is on a strict diet and cannot eat sweets. Furthermore, he cannot have any sugary drinks, or, moreover, consume processed foods."

The choice of transition depends on the specific context and meaning you want to convey in your sentence. It's essential to select a transition that best fits the logic and flow of the sentence.