Some users have told us they're not getting notifications about activity on the forum. It seems to be that you have to turn on notifications for each forum category you're interested in. To do this on the website, from the front of the forum look for the Follow button beside each category name:
or within the category, hit the More Actions menu and Follow Category.
On the mobile app ("Spaces by Wix", which is offered to you if you visit the site on mobile) you would go to My Sites > GrowIN > Forum tab, then switch All Categories to the category you want, then tap Follow on the right.
You should then get emails if you have email notifications turned on in the website settings, as well as pings from the Spaces app.