A lot of / lots of are used with both countable and uncountable nouns.

If there is a noun after a lot and lots , they take of

• I like to drink a lot of coffee.

• There is lots of traffic in İstanbul.

• There is a lot of work.

• He has lots of problems.

• There are a lot of cars in the car park.

• I want lots of apples.
• A lot of the pollution in our water comes from pesticides used in agriculture.
• We bought lots of ammo for our paintball game next weekend.
• Life is a bumpy road with lots of ups and downs.
• Eggs contain a lot of cholesterol.
• He contributes a lot of time and money to helping poor people.
• You should drink lots of water while you are playing sports

When a lot of and lots of are used with singular nouns, they take a singular verb.

• Lots of students have come to the ceremony.
• There is lots of time.
• There are a lot of drug users in this area.
• There is a lot of discrimination against immigrants in this country.
• A lot of rich people exploit the poor to get their money.
• A lot of the electricity is produced from hydro-electric dams.
• There are lots of jobs for teenagers in the tourist industry.
• Lots of tourists visit Prince Edward Island.
• Lots of money is needed for studying in Japan.