I am new to develop using Sitecore and have a question
I saw in some tutorial website there are addition links next to the field name, like
[Go to field]
[Go to datasource]
Is this required some modules or settings
Most probably it's a
Sitecore Extensions tool for browsers created by Alan Płócieniak.
Sitecore Extensions is a google chrome/firefox extension which provides small improvements for Sitecore CMS.
You can read more about it on: https://alan-null.github.io/2016/10/sitecore-extensions-crossbrowser
You can install it for Google Chrome: https://chrome.google.com/webstore/detail/sitecore-extensions/aoclhcccfdkjddgpaaajldgljhllhgmd?hl=en