Punctuation marks are the most essential part of writing. They show the reader where sentences start or stop. They also help people understand and read a sentence clearly and effectively. But even after years of learning, punctuation is just of those things people mess up. Sometimes, poor grammar punctuation could seriously work against you. For instance in the sentence “Let’s eat Grandpa” instead of “Let’s eat, Grandpa”.
- The Comma (,)
The comma is used in a sentence when-
-separate items on a list
-pause before proceeding
-use more than one adjective
-add a phase that does not contain any new subject
- The shopping bad was loaded with beer cans, fruits and juices.
- The boy, who knew that he dog was coming, ran quickly towards the door.
2. Full Stop (.)
A full stop is always used at the end of the sentence. It indicates that a point has been made and you are ready to move on to further explanation or related points.
- My name is Leela.
- Some bees prefer tree pollination.
3. Question Mark (?)
Question mark means that a sentence is asking a question. It comes at the end of a sentence. For example:
Are you going to a party tonight?- Do you want to grab a cup of coffee today?
- What is your name?
4. Semi-colon (;)
Semi colon is one of the most confusing sign of punctuation. It is used to join two connected sentences. 
- Dad is going bald; his hair is getting thinner.
- She calls it a bathroom, I call it the loo.
5. Colons (:)
The colon in a sentence makes a pointed pause between two phrases. It can be used in a heading or descriptive title. For example:
- There are two choices at the moment: run away or fight.
- Never forget this point: think before you speak.
6. Exclamation Mark (!)
Exclamation mark shows a strong feeling within a sentence such as fear, anger or love. It is usually used at the end of a word or a sentence, which 
means that the full stop after an Exclamation is not required. ex-
- Aw! That hurts!
- I love you!
- Stop! Police!
7. Apostrophe (‘)
The apostrophe is used to indicate possession or ownership. It can also be used to indicate where a letter is omitted. For example:
- The girl’s bag was red (Girl is a singular here)
- The girls’ bags were red (Girls in this are plural here)
- The time is now 80′ clock.
8. Hyphen (-)
The hyphen is majorly used to link words together. Hyphens are also used when the words are split between two lines. For example-
- Non-vegetarian
- Week-end
- Abby gave me a terrible hair cut- and expected a tip.
9. Brackets ( )
Brackets are used to make a point, which is not a part of the main flow of sentence.
- Sam (the boy from school) helped me with my home work.
- The children won their basketball game (It was exciting!)