First Visit: well this is the first time a user is visiting the website
Days Since Last Visit: Determines the number of days since a user last visited your site, and captures this information in a Analytics variable.
This return frequency data can be used to answer the following questions:
How frequently do users revisit my site? How does return frequency correlate with conversion? Do repeat buyers visit frequently or infrequently? Do users who click through my campaigns then return frequently? The plug-in can also generate values used for segmentation. For example, you can create a segment to view all of the data for only those visits that were preceded by 30 or more days of non-visitation by the user. So now we will be able to understand the final question
Less then one day Visit in Days Since Last Visit Report: This means the user who visited in last one day to your site.
We're looking at a similar measure and trying to record the 'number of first date visits' to the website only, eg, if someone visited on 01/05/17, then again on 03/05/17, then again on 10/05/17, we ONLY want to record the first visit on 01/05/17. Is there a way we can do this?