products page seo

Hello, I would like to know if have some huge title on the product page like the one below have some influence in the SEO for the page I'm working on? Thank you! Patriot PV570LUXWAK, VIPER V570 Blackout RGB FPS+MMO Gaming Mouse, 12.000 dpi avago laser sensor, up to 32.2g of adjustable weight...

Hi Everyone, I have an online store with the homepage being also the page where all the products are displayed, which i don't know what to do with when it comes to on-page SEO. Should I use the main and broad keywords on it or get more sepcific and use related words? Another problem i'm facing...