Leads vs Prospects in Distribution

Leads vs Prospect
No right or wrong term, however here are some interesting facts that may help you decide:

Back in the old days, Prospectors went searching for gold. They didn't know if they'd find any, but with experience some of them knew what type of terrain or rivers to look for.

Similarly, 'old school' sales, Prospecting was a term used for various types of cold calling, hoping to find somebody that may be interested in what you're selling.

So it stands to reason that even modern Social media marketing is in fact Prospecting.

The remainder I'm sure everyone here knows, but for completeness;
When somebody responds to the ads i.e filling a form, it would be considered a 'Lead'. Some would call this 'unqualified Lead'. Moving on, if a sales person contacts these they become 'sales qualified' and either Closed Lost or Converted into an Opportunity.

All the modules and basics for the above is included in SugarCRM out-of-the-box. Some may have not noticed that if you click on the menu for 'Targets', and look at the URL it is in fact /#Prospects.
(I personally rename Targets to Prospects because Targets get users confused thinking they are part of Target Lists.)
When you create a Target/Prospect, you also get the option to convert it into a Lead.

I think the lines between Lead and Prospect became blurred because some started treating the act of Prospecting and the term Prospect to mean different things, and some as the same thing.

I believe this is possible because so much content on the web is generated by copying or refactoring existing content, depending either on which came up top during initial Google search or preferred source.

Ultimately the choice is yours, although I prefer the old fashion terminology because it makes sense to me, and also because it's mostly out-of-the-box with SugarCRM.

To add to Vincent Amari 's explanation, specifically the out-of-the-box comments, we have a podcast episode ( Season 1 Episode 2: What's the difference between Targets, Leads, and Contacts in Sugar?) and a getting started Help Article (https://support.sugarcrm.com/knowledge_base/getting_started/introduction_to_contacts_leads_and_targets/) on this topic that may help as well. Also, here's the documentation section on Renaming Modules (https://support.sugarcrm.com/documentation/sugar_versions/13.3/sell/administration_guide/developer_tools/#Configuring_Module_Names) if anyone would like to investigate this process further. 

I hope this helps!

To add to Vincent Amari 's explanation, specifically the out-of-the-box comments, we have a podcast episode ( Season 1 Episode 2: What's the difference between Targets, Leads, and Contacts in Sugar?) and a getting started Help Article (https://support.sugarcrm.com/knowledge_base/getting_started/introduction_to_contacts_leads_and_targets/) on this topic that may help as well. Also, here's the documentation section on Renaming Modules (https://support.sugarcrm.com/documentation/sugar_versions/13.3/sell/administration_guide/developer_tools/#Configuring_Module_Names) if anyone would like to investigate this process further. 

I hope this helps!