In this blog you will learn ways to According to google Exploit means a sequence or a set of commands executed to know or exploit a specific vulnerability found in a system or application. It provides the attacker a way to access the computer having OS and pieces of information. Exploits include buffer overflow, code injection, and web application exploits. Metasploit Pro offers automated exploits and manual exploits. It was also confusing in the initial stage of the Metasploit journey. Before you start learning Metasploit you should know some of the things.
1. Why do you want to learn?
To get some info, by Exploiting the targeted machine. It can be Linux, Windows, Android others.

2. What kind of OS is your target has?
You can use Nmap to scan the IP and use the os detection method to get the OS details.

3. What to do next?
If it is android you can search for Android exploit.

run the command

 $ msfconsole

# It will list all the exploit Metasploit has

 $ search exploit 

# Now you want to check for Android exploits only

 $ search exploit android

# For Linux similarly for others

 $ search exploit linux

# For specific service exploits, for example, ssh

 $ search exploit ssh

# This is the way to search for exploit based on OS and specific service.

4. I want to use an exploit but I don't know how to do that?
simply run the commands mentioned below

#use EXPLOIT NAME

 $ use auxiliary/gather/qnap_lfi

# Now to get the more information for about this exploit

 $ info
 $ options

This will help you to know more about the usage of Metasploit. This is all you need to know. If you have any further questions comment below. I'll be glad to help you learn more about Linux things.

You should also check:

Thinsg you should do after installing metasploit

How to configure Metasploit database

How to Install Metasploit Kali Linux