Email Copy Subject Lines and Preheaders 1 — Questions and Answers
Question 1: What is the primary purpose of an email subject line?
- To summarize the email body
- To compel the recipient to open the email (Correct answer)
- To display the sender's name
- To pass spam filters
Correct answer: To compel the recipient to open the email
The subject line's primary job is to generate enough curiosity or value to make the recipient open the email.
Question 2: What is the recommended maximum character length for a mobile-optimized subject line?
- 25–30 characters
- 40–50 characters (Correct answer)
- 60–70 characters
- 80–90 characters
Correct answer: 40–50 characters
40–50 characters ensures the subject line displays fully on most mobile screens without being cut off.
Question 3: Which subject line technique uses a partial sentence to create curiosity?
- Social proof opener
- Open loop (Correct answer)
- Direct benefit statement
- Question hook
Correct answer: Open loop
An open loop leaves the subject line unresolved, compelling readers to open the email to complete the thought.
Question 4: What is a preheader in email marketing?
- The sender's email address shown below the name
- The preview text that appears after the subject line in the inbox (Correct answer)
- The first image displayed inside the email
- The footer unsubscribe link
Correct answer: The preview text that appears after the subject line in the inbox
The preheader is preview text shown in the inbox alongside the subject line, offering a second chance to entice the open.
Question 5: Which of the following subject line elements is most likely to trigger spam filters?
- Personalized first name
- ALL CAPS and excessive exclamation marks!!! (Correct answer)
- A question format
- A numbered list promise
Correct answer: ALL CAPS and excessive exclamation marks!!!
Excessive capitalization and multiple exclamation points are classic spam trigger patterns that hurt deliverability.
Question 6: When A/B testing subject lines, what is the recommended minimum sample size per variant to get statistically significant results?
- 100 recipients
- 500 recipients
- 1,000 recipients (Correct answer)
- 5,000 recipients
Correct answer: 1,000 recipients
A minimum of 1,000 recipients per variant is generally needed to achieve statistically meaningful open rate differences.
Email Copy Subject Lines and Preheaders 1
What is the primary purpose of an email subject line?