What is the use of Sibling in Xpath

Question

I have learnt about contains() but heard about sibling but unsure about what exactly it does? Could you please help me with that

Answer 1

Using sibling keyword, we can fetch a web element on the which is related to some other element.

For example:

"//div[@class='canvas- graph']//a[@href='/accounting.html'][i[@class='icon-usd']]/following-sibling::h4"