How much time you spend is up to you and what you want to accomplish. If you’re using social media primarily for fun and for connecting with others, there’s nothing wrong with being on these sites a lot. However, if your main purpose with social media is to promote a website or blog you should limit the time you spend. Other activities like content development and site management should not be sacrificed due to the time you spend on social media sites. Generally, you may need to use social media sites a little bit more at first in order to get familiar with the site, its users, and to build a profile. But later you should be able to cut back on the amount of time that you spend, but still be active on a regular basis.