c'est

1. it is (used to define the preceding word)
2. it is (used to introduce a focus)
3. this is

quoi

• Pron

  1. what
  2. (colloquial) what
  3. what, (that) which
  4. what, (that) which
  5. enough (of something specific)
  6. nothing
  7. whatever
  8. whatever

• Adv
• Phrase

ça

• Pron

  1. (informal) that
  2. (informal) this
  3. it
  4. used to indicate actions happening generally without specifying an agent, like on but with a greater suggestion of mass, generalized, unattributable, or confused action; people
  5. they

• Noun