The workflow for the membership renewal process is as follows:

In order for the membership renewal prompt to display on your constituent's page, the batch process ORD650 for membership renewal needs to be run in the back office.
As a best practice, it is highly recommended that you run ORD500 batch process (see ORD500-Expired Order Cleanup Process for more information) in order to remove expired membership renewals. This will ensure that when your constituent logs in to renew his/her membership, he/she does not see multiple years' worth of membership renewals.
This renewal process is not restricted to the primary member group. 
 Any simple membership, regardless of member group, can go through this 
 process, as long as the member group is marked as Include 
 in CRM360 on the Membership Structure Maintenance screen, as highlighted 
 below.

 If 
 your web site is set up to accept different currencies, as a best practice 
 for donation products, the donation amount options defined should be open-ended 
 donation amounts and not suggested donation amounts. If not, the screen 
 will display a suggested amount such as $100, as 56.72 EUR. The conversion 
 will occur even if the gift is set up with a rate for the non-base currency, 
 such as from the Euro to the Dollar. See Donations 
 Overview for more information.
If 
 your web site is set up to accept different currencies, as a best practice 
 for donation products, the donation amount options defined should be open-ended 
 donation amounts and not suggested donation amounts. If not, the screen 
 will display a suggested amount such as $100, as 56.72 EUR. The conversion 
 will occur even if the gift is set up with a rate for the non-base currency, 
 such as from the Euro to the Dollar. See Donations 
 Overview for more information. 
If you want to display a membership donation product in the Optional 
 Contributions section, as shown below, you need to set the membership 
 donation product as a master product. See Defining 
 General Membership Products for more information. 
