If you want to make some minor edits to your current running FB ad but still want your ads to run continuously, then you could use the “Create similar advert” option.
Editing the current running ad will send the ad for review and ad delivery will stop. The delivery status will change to “Pending Review” till the ad is reviewed by Facebook team.
If it is an important day (like a sale) and you don’t want your FB ads to stop, then it is much better not to make the minor edit to the current running ad. Instead, create a copy of the current ad and once that is approved then you can pause the current ad.
Normally ad approvals happen fast but sometimes it can take time, so if you do not want to take chances, remember to create similar advert.
Leads ads on Facebook have been generating very good results for the client accounts I manage.
The cost per lead is coming lower than Google AdWords and its interesting to see which age & gender is responding best to our ads, this is something we cannot easily know in Google Adwords.
During last year I have noticed that Facebook has rapidly improved their ad platform in almost all aspects including the targeting options, available ad formats as well as the interface to create and manage ads.
Facebook lead ad remarketing
An interesting feature, added quite recently is the ability to remarket to people who interacted with your lead form but did not submit the form.
This audience is potentially very valuable because they took interest in the ad offering and almost reached the point of conversion. I am testing this in some accounts and the results so far look interesting.
More information about Lead Ads : Lead Ads: Connecting People with Businesses in Just Two Taps | Facebook for Business