Is it important to retain a customer or to change your product/service line to target more customers?

I think the most important that you should provide the best quality of service or product.
That will retain your existing customers because they will trust in you.
But you should be very innovative and always find out how you can be more attractive on the market and get more cutomers. 
There should be constant improvement in every bisuness and develop the products or services.
Especially because the technical evolution never stopps and all business is effected by technical tools or equipments.

make your customers belive in ur product  

Both are inportant because u hv to retain ur existing customer and u also have to develope new product according to change in customer preferences.

It is more important to get additional product line targeting the market you are looking to cater, Ofcourse that will mean that you have a good knowledge of the market and you have surveyed the market and are aware of the potential market that you have for you new product.
Replacing client is never a sucesfull business decision, A sucesfull decision will be to target newer segment while still having your old clients at hand.

It's a proven fact that maximum business comes from exiting customer base.
Business from exising customers are more profitable as the cost of such business is less and takes lesser time.
It is therefore very important to have customer retention.
Making new customer is an expensive affair because of extra efforts, more manhours and high risks with high uncertainity to make a customer.
Increasing your product portfolio will be of immense use to add more new customers from wider market segment.

Compnay should try to retain existing customers while trying to win new customers, because it is easier to keep your customers than to attract new customers.
To win new customers you should spend millions for doing research for new products and advertising the same in present day world.
You have to face severe competition even in the second case.
That's the main reason for most of companies to introduce various types loyalty programs.

One should always strive for Organic growth. That's what keeps customers, shareholders and stakeholders happy.

Retain & satisfy the current Customer is more important, cos Changing lines and services to meet more potential Cust.
is an illimitable & infinite desire.

first hold your customer its better to hunt a new customer. change your product and survice to keep update and modify your role to play with defferenciation.

 taking step to satisfy your existing customer you have to improve quality aand service.

very important thing to do is to retain ur existing customer and at the same time source for potential consumer by bringing other or new variaties of product to join or replace existing products, if there is the need for diversification so be it and also to remember that diversification is one of the way of providing solution to the customers need. in conclusion an organization should ensure that customers specification,request and sugestion is put into consideration as well as the result of their market survay so that through diversification, two things can be met which are retaining existing potential customer as well as targeting new market.