Written codes include printed language which is text you can see within the frame and how it is presented, and also spoken language, which includes dialogue and song lyrics
They are different spoken codes potrayed in the advertisement. The language style used in the advertisement must be linked to the content of the advert and the audience watching the ad. For instance,the advert titled sambaza Internet has used sheng since then advert is mostly linked to teenagers and teenagers mostly deal with Internet issues compared to any other age group
Technical codes
Camera shots:-
Eye level shot

An Eye Level shot is where the camera is positioned as though it is a human actually observing a scene, so that eg actors' heads are on a level with the focus and the camera will be placed approximately five to six feet from the ground
The eye-level angle is the most common shot. The camera is positioned so the subject can look directly into the lens without moving his eyes up or down -- whether or not the subject actually looks into the lens. It is considered to be emotionally neutral and is best used for straight, factual presentation.
This type of shot has been used when Richard wa chapo restaurant where the camera only points at his face in general but the camera is mainly focused on his eyed. This is used to show that may be the subject is really thinking hard on something or showcase some high levels of concentration on something by the subject.
Camera angle:-
High angle shot
A high-angle shot is a cinematography technique where the camera points down on the subject from above.  High-angle shots are used to make the subject or object seem vulnerable, powerless, or weak.
As the definition  explains, this type of camera shot is when subject is pointed by the camera being high above. In the advertisement known as safaricom  maasai we can see that the camera is pointing  the subject who is the maasai while its high above. In this case this is used to show the subject to be dominating since he is giving a hand of help to fixing the vehicle's tourist
Camera movement:-
Panning is when you move your camera horizontally; either left to right or right to left, while its base is fixated on a certain point. You are not moving the position of the camera itself, just the direction it faces. These types of shots are great for establishing a sense of location within your story. 
This movement is mainly potrayed when we want to see the topographical place, what the subject is doing and where he/she is heading to. This type of shot is mainly used when livestreaming football matches. 
In the advert titled safaricom maasai this is type of camera movement is used when the driver goes to seek help after the car breaks down.

Socio-economic data that describe a user. This group includes attributes, such as age, income, education, gender or geographic location. Using demographic data you can target your campaign for example at old people (eg. age 60-74), both genders  female and male from towns with a population larger than for example a million people.

• Interests

This is data about users’ hobbies, passions, things that they are looking for and read about. It can be,  books, movies, music, cars, marketing, parenting or dance. By knowing your customers’ likes and interest you gain meaningful and important information since you know how to sustainably engaged your clients, what product will capture their interests.  For example, you can offer a novel or a storybook for book lovers or newly released song of their favorite artist.

Data that can be crucial especially for e-commerce. Audiences are divided into groups of users who recently looked for a specific product, e.g. laptop, refrigerator or car and did not look for it previously. It means that they want to buy a new thing, but first need to gain more knowledge about the demanded product. Examples of audience types in this groups are Women’s clothing, Skiing, Televisions, Tablets or Vehicles.

In this circumstance I would place my audience using their interest e.g safaricom is using artist whom they make their own  "skiza tunes" and sell them to the community.This make several people to subscribe to Safaricom simply because of their interest which is listening to Music from the favourite artist.

There is no doubt about the importance of market research. To prove this statement, let’s view why you should research markets. Market research is important for your business because it provides you with the following opportunities:

In our case we intend to do market research in order to understand what the consumers love about our particular product and what they don't like about it  in order to improve it. Market research also makes the consumer feel associated with the making of the product hence even yearn to use it more and more. This is one of the strategies that make a product sale more and also seal its consumers for them not to go supporting other competitors by buying their products.

UNIQUE SELLING POINT (USP)
Also known as unique selling proposal is the essence or something in additional,which makes your product or service better than your competitors products.It is advised that e.g in online marketing, it is important to communicate your USP earlier and quickly to lure your consumers to convert to your website.
In safaricoms products they normally have good unique selling points which are considerable by the consumers e.g the the "MPESA" services which safaricom subscribers can use to transfer money and also paying for goods and services without having any contact with money. This makes many people become interested in this mobile network since they need to transfer money from one place to another at an affordable cost.

Reference https://business.tutsplus.com/articles/why-is-marketing-research-important--cms-31593

A necessary piece of equipment to keep your footage looking steady and professional.

Sometimes a nice pop of light from the camera can help fill in ugly shadows. A camera light is a nice accessory to have especially in a documentary/news style shoot where you might not have time for a full 3-point lighting set-up.

You only really need a lighting kit if you're planning to do a lot of shooting inside. Creating a well lit scene usually involves a 3-way lighting set-up. 

Great audio often separates the pros from the amateurs. Having a shotgun mic prepares you for almost every situation. It's perfect for setting on top of your camera or a boom pole.

A boom mic set-up comes in handy to capture audio from a group interview, crowd scenes or any situation where you need to gather professional audio quickly. 

Here's the simple gadget needed to turn your shotgun mic into a boom pole mic. A shock mount keeps the mic steady on top of the pole and prevents the mic from picking up "bumping" sounds when the pole is moving around. 
Ref: https://www.desktop-documentaries.com/video-production-equipment.html