Purposes

The purpose can be general or specific

General-purpose

To inform

Specific purpose

To inform the audience about two areas of the stem cell research program

To inform the audience of the current laws about divorce

To inform the audience the differences between a and B subject

To underline your purpose you must

Use infinitive sentences

To inform my audience of new registration procedures

To persuade your audience

To introduce your audience to a new product

Take always in mind your audience

Limit your specific idea

To persuade the audience of something

Limit yourself to what is reasonable

Use specific vocabulary