Confused about wireless access points and routers

I know a wireless router sends signal to my computer. but what does a wireless access point do? i understand it connects to your router, but whats it purpose? does it make your signal stronger or what??
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More about confused wireless access points routers
  1. It can act as a range booster.
  2. Both an access point (AP) and a wireless router give you wireless access to your network and to the internet, along with signal encryption features. The difference is that, while an AP gives you just this, a router also gives you DHCP (automatically assigning IP addresses), NAT (hiding all of your computers behind a single IP address) and most likely a firewall as well.
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