What is the difference between 'a lot of' and 'lots of'?

The only difference between 'a lot of' and 'lots of' is in their usage. This actually depends on which of the two is more acceptable in formal writings or conversations than the other. Although the two expressions are usually considered informal by most English speakers, 'a lot' is usually considered to be standard and more acceptable than lots of. Aside from this little difference, both expressions are very similar in meaning.

“A lot of” means a large amount of anything. For example, I have a lot of business ideas that I'm ready to execute. Lots of cans be explained to have come as the plural form of the word 'lot.' A lot means a large quantity or number, or one or more materials auctioned as a unit. So, we can as well use 'lots of' in place of 'a lot of' in the example given above. Also, both expressions can go with countable and uncountable nouns.

They both mean a sizable amount of either people or things. A lot is used in the expression a lot of and a lot of refers to a measure of something or a number of objects, or it could even mean a large amount of quantity, as well as all of the members of a particular group. This word may apply to a group of people. The plural lots mean much or many, and it measures the greatness of the amount in question.

Both expressions can be utilized with countable and uncountable nouns. Countable nouns are people or objects that can be physically counted. For example, you could say, “there are a lot of cats up for adoption.” Uncountable nouns, on the other hand, are objects that cannot be counted or divided. For example, the word water cannot be calculated. For instance, you could say, “I like lots of music.”