Frequency illusion, also known as the Baader–Meinhof phenomenon, is a cognitive bias in which, people after noticing something for the first time, tend to notice it more often, leading someone to believe that it has a high frequency

You must first trigger the frequency illusion by making potential clients aware of your product in the first place. The best way to do this is to use strong headlines and vibrant images that command attention.

Retargeting ads are 10 times more likely to be clicked than normal ads. Whilst these statistics often come with little reasoning as to why it’s the case, familiarity is usually the number one reason.

Pair the frequency illusion with social proof, user-generated content, and social-media sponsorships.

The Base Rate Fallacy occurs when we are too quick to make judgments, ignoring base rates or probabilities in favor of new information.

Research:

One experiment presented participants with a fictional hit-and-run accident happening at night. The only eye-witness told that it was a blue taxi cab.

In the city, there are only two taxi companies, the one with green cars has 85% of the city cabs, and the other has 15%.

The witness has been tested on reliability, and he correctly identified colors at night 80% of the time.

To the question "What is the likelihood that the cab involved in the accident was blue rather than green", most participants answered there's 80% for the blue one, although the correct answer is 41%.

People are poor at understanding statistics and percentages so avoid using such data to explain the features or performance of your product or service. 

Allow people to understand how your proposition solves their problem by giving specific examples, showcase studies, and testimonials.

If you want to know the analytics of your website, check it as a whole. Don't base solely on the newest information.

People allow themselves to indulge after doing something positive first.

Drinking a diet coke with a cheeseburger can lead a person to subconsciously discount the negative high caloric and cholesterol of the meal.

Research:

A study on dietary supplementation found out that people who took multivitamin pills were more prone to subsequently engage in unhealthy activities.

The licensing effect is responsible for stores to keep the vegetables and bread next to the entrance and sweets next to the cashier.

After buying seemingly healthy food (vegetables) you give yourself permission to buy a chocolate bar.

If your brand does good things display this fact when the user enters your website “By shopping with us, you are doing X good thing!”

Give your customers a reason to feel good morally.