Hi
Try SEO Optimizer bit slim on fetaures at the moment but:-
Allows you to add more rules to ROBOTS.TXT to exclude unimportant and harmful pages.
Allows you to set a unique META DESCRIPTION on the home page to remove duplicate META DESCRIPTION across pages.
Uses the recommended image optimizers of Google PageSpeed Insights (jpegtran.exe and pngout.exe) to losslessly compress images before serving.
There are also a few common issues with Nop such as duplicate meta descriptions, etc see the links below
