If you are unsure whether to distribute your survey via email or via web, here are some things to take into account to assist you in your decision.
Email distribution is used to reach a targeted audience of which you have the email addresses.
CheckMarket can send thousands of emails and collect the results from thousands of participants very quickly. You can edit your invitations and reminders yourself
CheckMarket also offers several ways to distribute your survey via Web.
In some cases a combination of these two distribution methods can be interesting. E.g. if beside your existing groups, you wish to reach other people or if you calculated the optimal sample and do not have enough email addresses at your disposal to collect the minimum number of answers needed in order to obtain statistically significant results.