If you are pleased, you are happy about something or satisfied with something.

If you say you will be pleased to do something, you are saying in a polite way that you are willing to do it.

You can tell someone that you are pleased with something they have done in order to express your approval.

If someone is not too pleased or is none too pleased, they are annoyed about something or do not think something is acceptable.

When you are about to give someone some news which you know will please them, you can say that you are pleased to tell them the news or that they will be pleased to hear it.

In official letters, people often say they will be pleased to do something, as a polite way of introducing what they are going to do or inviting people to do something.

If someone seems very satisfied with something they have done, you can say that they are pleased with themselves, especially if you think they are more satisfied than they should be.

You can say 'Pleased to meet you' as a polite way of greeting someone who you are meeting for the first time.