Open Rate is to check how many emails sent received attention and were opened by the people. For example, a 40% open rate would suggest that 4 out of every ten emails dropped in the inbox were actually opened by the people. However, salesforce email marketing interview questions and answers for freshers may not always directly ask the meaning of open Rate; rather, they may ask you to suggest a good open rate. The answer always depends on the industry that you are opting for. Therefore, complete your research beforehand and find the average open Rate that is suitable for the particular industry.