Salesforce Sales Cloud

I've been a salesforce administrator 3 times. At one of the companies we integrated nearly everything into salesforce. The joke was the janitor couldn't take out the trash without a salesforce entry.

It does some things well. But, over the years it has become too bloated. Small companies just don't need all the functionality and costs.

The cost has gotten too high. There are competitors on the market that do it very well for a lot less. Programming used to be pretty easy. That has gotten more difficult over the years. To the point where I am no longer a fan. I am a firm believer in CRM. I built my first CRM from scratch in 1988. There was no shrink wrap back then. But the program has gotten bloated and suffers from mission creep.

Salesforce service cloud a complete package of solution to the business or industry which has there product and sales , Leads , Campaigns etc are included .
There are out of the box functionality which helps the business with multiple automation tools etc.
There are standard object such as Campaigns , Trade Shows , Leads, Pricebook etc which can directly be used to store the data . There are tools of salesforce such as workflowes , process builder , flows which are used to automate things such as record update or sending a email to the client automatically.
We can build lightning components which can be used as a User Interface by the client to add the details and interested area.
Leads can be generated through multiple campaigns where a client login and shows interest in some products . Those leads are assigned to a queue or a particular team using Lead assignment rules so that they can work on it and convert the Lead .
Salesforce is a cloud based technology so it is available with you wherever you go . The data will be stored in Salesforce itself and there is no chance to lose data of clients .
Overall its a great package provided by Salesforce to large business to make things easy for them.

The lightning experience is really slow as compared to Classic . it usually takes time to reload the website as it is totally cloud based technology .
They cn much better work on the user interface to make it real quick as loading the Lightning Components and web components takes time to load .
The mobile experience on Tabs is not that great and can be improved.

The Salesforce platform is highly customisable, so while you get some features out of the box that you can implement, you are only limited by the imagination (and technical knowhow) in where you want to take the system, and the platform can grow with your needs should you wish to move outside of Sales only, there are add ons that can be purchased/enabled which will allow you to manage multiple areas of your business should you wish.

There is a possibility to over engineer the system, or to create too many customisations, which could lead to boxing yourself in, luckily there are plenty of resources available to be able to steer you in the right direction