There are people who will waste your time if you lose control of the conversation, and then you will not get much business done.
so they understand what our saying
It is important that you speak clearly and distinctly, it represents good manners and improves communication
To mumble refers to the inability not to speak clearly.
the main language of the world is english and most of your customers may or may NOT speak english
Speak clearly and with enough volume so you're heard by everyone in the audience.
I think you are mistaken, a chemist (that is a chemists shop or pharmacy) will use its landlines (telephone) during the day to speak to customers.
It helps the company you are working for from losing customers. In other words, if you can speak professionally to the customers, they are likely to return to your store for continued business.
Answer the telephone no later than the second ring. Identify yourself in a friendly tone. Use the caller's name. Gather as much information as possible. Do not interrupt the caller. Give accurate information.
open your mouth really WIDE so that you speak really clearly :)
I will speak in english better
Yes, it is important to speak loudly enough to be heard clearly by others. Proper projection and volume are essential for effective communication, especially in group settings or noisy environments. Speaking clearly and audibly can help ensure that your message is understood and received accurately.
you speak into it
Mumble or slurred speech could be considered antonyms of "speak clearly."