C-c % (org-mark-ring-push) Push the current position onto the mark ring, to be able to return easily. Commands following an internal link do this automatically
C-c & (org-mark-ring-goto) Jump back to a recorded position. A position is recorded by the commands following internal links, and by C-c %. Using this command several times in direct succession moves through a ring of previously recorded positions.
Headings produce sections, and you want to link (hotlink) to this section elsewhere in the document, and even have that produce a valid URL/anchor link on the HTML export.
For this, use a custom section ID heading:
* Section One
:PROPERTIES:
:CUSTOM_ID: sec:one
:END:
* Section Two
You can reference Section One with [[#sec:one]] but NOT
[[#sec:one][Section One]], i.e., the link without description
will get you the actual section number (1).