What Does The & "*" Part Of This Query Mean And Do?

SELECT [UK Table].[Business Name], [UK Table].[Business Type], [UK Table].Address, [UK Table].City, [UK Table].Country, [UK Table].[Telephone Number], [UK Table].[Website Address], [UK Table].[Email Address]
FROM [UK Table]
WHERE (([UK Table].[Business Name] Like Forms!frmNz!txtBusinessName & "*") Or (Forms!frmNz!txtBusinessName Is Null)) And (([UK Table].[Business Type] Like Forms!frmNz!txtBusinessType & "*") Or (Forms!frmNz!txtBusinessType Is Null)) And (([UK Table].Address Like Forms!frmNz!txtAddress & "*") Or (Forms!frmNz!txtAddress Is Null)) And (([UK Table].City Like Forms!frmNz!txtCity & "*") Or (Forms!frmNz!txtCity Is Null)) And (([UK Table].Country Like Forms!frmNz!txtCountry & "*") Or (Forms!frmNz!txtCountry Is Null)) And (([UK Table].[Telephone Number] Like Forms!frmNz!txtTelephoneNumber & "*") Or (Forms!frmNz!txtTelephoneNumber Is Null)) And (([UK Table].[Website Address] Like Forms!frmNz!txtWebsiteAddress & "*") Or (Forms!frmNz!txtWebsiteAddress Is Null)) And (([UK Table].[Email Address] Like Forms!frmNz!txtEmailAddress & "*") Or (Forms!frmNz!txtEmailAddress Is Null));

I have used this query but fail to know what the & "*" part means. What does it do? What does it mean?