How to create custom Links in salesforce

Step 1:  Go to setup --> Home --> Custom Links --> click on "New" Button --> Fill the details

Then click "save".
Step 2:Go to setup --> Home --> Home Page Components --> click on "New" Button --> Give Name and select Type as Links

 Then click "Next" -->Add to link which is to be displayed

Then click "Save".
Step 3:Go to setup -->Home --> Home Page Layout --> select particular layout by clicking Edit next to it

 Search for created Home page Component(here Accounts Tab) and check that checkbox --> Next --> Order the components

Then click on "Save".
Step 4:Go to Home Tab --> Here you find the link.

Once it is clicked it will redirect to custom Link url which we provided.