How important now a days to manage your Ads on social media or Google Ad?

Extremely Important. Effective Management of your Google Ads/Social Media campaigns will improve your CTR ( ClickThrough Rates) reduce your CPC ( Cost Per Click) and will also make your campaigns result oriented and effective. 

Social media marketing is now the utmost need of this era and managing your ads is very crucial as ads cost money and there has to be proper budget allocated for managing ads on social media platforms.

Agreed but what about to generate the sales lead from these ads what will be %age we can consider as response.