Improving the open rate should not be your priority.

We found many articles on the Internet on how to improve the open rate and it is reasonable considering that the opening of an email is the condition sine qua non the user establishes a conversation with the company through this medium. However, we never tire of repeating that optimising the open rate should not always be the main objective of an email marketing campaign or strategy.
A/B testing, subject and sender optimisation and other factors can help us to obtain better data on opening ratios, however, an in-depth analysis of the data obtained can provide us with other interesting information.

For example, let's look at the following scenario:
In an A/B test option b with a very short and concise subject line gets a higher open rate. These tests are used in many cases to analyse the effect of the subject line on this ratio, so we might think that the winning option would be B. However, when we go further and look at other data in the report, we often see that the "loser" option in terms of open rate offers better data for the click rate and reactivity. In this case, option A, with a longer and more descriptive subject line, yielded higher reactivity data. It is a common scenario: shorter subject lines move to action more easily, but more descriptive subject lines lead to action for users who are more interested in the content. This means that with a shorter subject line we may be driving impulse opens, but one that is more focused on the relationship with the content of the email encourages a more qualified open, from users with real interest.

Ultimately, the open rate is important, but the objective of the email marketing strategy should look beyond that and be guided more by conversion targets and desired actions by users than by simply opening our campaigns.
 
NOTE: The opening rate does become more important in strategies aimed at warming up IPs, optimising deliverability, ... as it is a key indicator of the reputation of senders.