If you’re the creator of a Facebook group, you’re automatically its admin, or administrator. Additionally, you can be added as an admin of someone else’s group. After you have members in your group, you can use the group member list to remove (and even permanently ban) undesirable members, promote your most trusted members to administrators, or demote your existing administrators (if any) back to regular members.
Facebook limits the maximum amount of time that people will stay in a custom audience, based on website traffic, to 180 days. After this time period, those in the website custom audience will be removed unless they revisit the website. You can stay top-of-mind by simply creating a custom audience of people who visited your URL within the past few months and run remarketing ads before they’re removed by Facebook. How To Do Facebook Emoticons
There’s far greater complexity to people’s buying habits and actions beyond the fact they’ve visited a website within the last month. Susan recommends studying the buying and lead acquisition patterns for your brand. If you find that most of your customers tend to convert within a few days of visiting your website, then you would be paying for 30 days worth of Facebook impressions that are no longer relevant.