I also got this from the website . If you would like to read it for yourself, here it is: http://www.all-about-spelling.com/silent-e.html
Taken directly from the site.
Here are the six jobs that Silent E performs:
Job #1: Silent e can make the vowel before it long (note).
Job #2: Silent e can make c and g soft (race, page).
Job #3: Silent e keeps u and v from being the last letter in a word (clue, give).
Job #4: Every syllable must have a vowel. Silent e adds a vowel to words with the “consonant+le” pattern, such as handle.
Job #5: Adding a silent e can keep a singular word from ending in s, as in the word goose. Without the e, this would look like a plural word: goos.
Job #6: Other miscellaneous reasons for silent e include:
The e used to be pronounced (come).
To distinguish between two words (or and ore).