When emailing a group of users personalise the communication by using placeholder (or field) 

In Modify Templates and the Communication module you can use Placeholders or Fields to insert data specific to the recipient 

e.g. sending an email to John, Paul, George and Ringo with on email, on would use 

Dear %%first_name%%

I hope you are well

and each recipient would receive the email addressing them personally

i.e.

I hope you are well

 Dear Ringo

I hope you are well

etc

Examples of Placeholders: 

%%display_name%% will insert The full display name, including title of the recipient. Formatted based on the users preference.

%%email%% will insert The recipients email address.

%%event_name%% will insert The name of the current event

%%event_url%% will insert The url of the current event

%%first_name%% will insert The recipients given name.

%%Insert Signature%% will insert Email Signature

%%last_name%% will insert The recipients family name.

%%url%% will insert The primary url action (confirm,etc).