The feature is not enabled by default, but users must enable it by activating a Chrome flag:
chrome://flags/#read-later Once enabled, a new option will be added to the Chrome tab right-click menu.
Once selected, this option closes the tab and adds the tab link to a bookmarks folders called Reading list.
If the Chrome bookmarks bar is activated, this folder can be accessed via a button on the bookmarks bar’s right side, named Reading list.
Once pressed, a dropdown list shows all the tabs that have been set aside, along with the tabs that have already been read.