Open rate

There are two types of "open rates"- one for electronic mail (aka e-mail; see below) and one for physical mail (aka snail mail via the USPS or other physical mail carrier).

Email Open Rate

The email open rate is a measure primarily used by marketers as an indication of how many people "view" or "open" the commercial electronic mail they send out.[1] It is most commonly expressed as a percentage and calculated by dividing the number of email messages opened by the total number of email messages sent (excluding those that bounced.)[2][3][4]

Some Email Service Providers (ESP) also track unique email opens. Similar to an email open, unique email opens eliminate all duplicate opens that occur.[5]

Tracking Email Open Rates Open rates are typically tracked using a transparent 1x1 pixel, or small transparent tracking image, that is embedded in outgoing emails. When the client or browser used to display the email requests that image, then an "open" is recorded for that email by the image's host server. The email will not be counted as an open until one of the following occurs:[6][7][8]

  1. The recipient enables the images in the email or
  2. The recipient interacts with the email by clicking on a link

The open rate of any given email can vary based on a number of variables. For example, the type of industry the email is being sent to.[9] In addition, the day and time an email is scheduled or sent to recipients can have an effect on email open rate.[10][11] The length of an email's subject line can also affect whether or not it is opened.[12]

Tracking Concerns Open rates is one of the earliest metrics applied in email marketing, but its continued use has become controversial due to conflicting views on its usefulness.

The open rate for an email sent to multiple recipients is then most often calculated as the total number of "opened" emails, expressed as a percentage of the total number of emails sent or—more usually—delivered. The number delivered is itself measured as the number of emails sent out minus the number of bounces generated by those emails.

This method leads to problems with interpretation, since the request for the tracking image gives no indication of whether the email's recipient actually viewed or read the email or its contents.

In addition, many webmail services and email clients block images by default, or the recipient may elect to receive text-only versions of an email. In both cases, no image call can ever be made, further reducing the accuracy of the open rate measure.

As a result, open rates are broadly rejected as an absolute measure of a commercial email's performance.[13][14] However, many marketers use open rates as a relative measure, for example to compare the performances of emails sent to similar recipient groups, but at different times or with different subject headers.

Physical Mail Open Rate

The "open rate" for physical mail is difficult to quantify when compared to electronic mail but it is extremely important to the success or failure of response-oriented mail (marketing, billing, recovery, renewals, etc.). In fact, physical mail open rates can, and should, be further segmented and defined:

Open Rate (physical mail): The rate at which a piece of mail is opened within 30 days as determined by the recipient’s conscious and sub-conscious judgments about the un-opened mail piece; this decision is often made in 3–5 seconds.

Open NOW Rate (physical mail): The rate at which a piece of mail is opened while it is being looked at for the first time as determined by the recipient’s conscious and sub-conscious judgments about the un-opened mail piece; this decision is often made in 3–5 seconds.

Though physical mail, also known as "snail mail" or direct mail, may be overshadowed by email marketing, it's still considered an important part of some business' marketing strategy.[15][16]

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gollark: pls latex \sum_{x=1}^{4} x^2
gollark: pls latex \sum_{x=1}^{4} x
gollark: pls joined
gollark: pls repost 883030901318111242

See also

References
  1. https://www.campaignmonitor.com/resources/glossary/email-open-rate/
  2. "Email Open and Click Rates: Benchmarks and Trends". July 30, 2012.
  3. "How to calculate email open rates". June 10, 2011.
  4. John Arnold (April 2011). "Calculating the Open Rate for Your E-Mail Marketing Campaign" from E-Mail Marketing For Dummies, 2nd Edition.
  5. "Email Campaign Performance Metrics Definitions". Retrieved December 18, 2012.
  6. "Email Marketing Metrics: Open Rates". June 5, 2012.
  7. John Arnold (April 2011). "Calculating the Open Rate for Your E-Mail Marketing Campaign" from E-Mail Marketing For Dummies, 2nd Edition.
  8. Matt Clarke (June 22, 2012). "Email open rate tracking in Google Analytics".
  9. "Q2 2012 Email Trends and Benchmarks". September 2012.
  10. "Email Open, Click Rates Seen Lowest During Work Hours". July 25, 2012.
  11. Informz, Inc. (2012). "Association Email Marketing Benchmark Report".
  12. "Email Open Rates Seen Best in Morning, Clicks in Late Afternoon". March 14, 2012.
  13. "Email Open Rate Woes: Why Not to be Fooled by Email Open Rate?". Retrieved December 2012. Check date values in: |accessdate= (help)
  14. "What do email open rates mean?". August 2006.
  15. "Snail Mail: Trash or Treasure?". January 9, 2012.
  16. Steve Olenski (March 11, 2012). "Direct Mail: Alive and Kicking".
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