The words "were," "or," and "where" are distinct in meaning and usage:

• Were is the past tense of the verb "to be." It is used to indicate a state or condition in the past for the second person singular and plural, as well as the first and third person plural. Example: "They were happy." It can also be used in hypothetical or subjunctive statements like "If I were you..."

• Where is an adverb and sometimes a subordinating conjunction used to refer to a place or location, either physical or metaphorical. It answers questions related to place ("Where is the book?") or introduces clauses specifying a location ("The house where I was born"). Example: "Where did you put the keys?"

• Or is a coordinating conjunction (not covered in detail by the sources) used to link alternatives or choices, e.g., "Would you like tea or coffee?"

In summary:

• Use were to describe past states or actions related to "to be."
• Use where to discuss locations or places.
• Use or to present choices or alternatives.

Each has distinct purposes in grammar and meaning. If more detail on "or" or additional examples are desired, that can be provided.