أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
For the first part of question i am not getting what you are trying to say, but regarding open rate in email marketing it's on of the most important metric that gives you initial feedback about how well your campaign is performing.
For higher open rate keep your title content so clear, short & informative with reason and motive for the email to be clicked.
Best of Luck :)
