I don't see how that's a solution.
What I need is something to refresh only affected pages and categories; and only when a change is made,
like m-turbo is supposed to work, not every page on the site
"Enable automatic refresh for preview of categories of saved product:". It is similary to previous case. If administrator updates product which is placed in categories "A", "B", "C" ... etc. then M-Turbo refreshes the pages for categories "A", "B", "C" ...etc. . Thus, it refreshes the pages of all categories where updated product is placed.
"Enable automatic refresh for previews of parents of categories of saved product:" M-Turbo refreshes the pages of all parent categories of categories where updated product is placed. Thus, in the context of previous case they are parent of "A", parent of "B", parent of "C" ... etc.