What is the difference between Insert and Enter?
If I have a form to fill in, which legend is better?
Insert your data
Enter your data
Insertion and Entry are clearly synonyms in my opinion. Although for the data context, "insert" differs "enter" because insert is conventionally used when you add data with an specific location aspect, e.g. Insert punctuation between sentences or insert a space between paragraphs. While enter can also be used for this, its more often used for a generic description. In other words, without the location aspect, e.g. Enter your contact information.
Saying "enter quotes around your name" still sounds ok to me, but for some reason "insert quotes around your name" sounds better.
Mostly opinion based question
If you are filling in a form, the best choice is:
enter your information, not data. Your information then becomes data for the organization that is collecting it.
insert is used in existing text or words where you add something more.
insert means to place text or letters between two existing things.