Through entasher.com you can 

1- Browse agencies by service for example if you are searching for digital services you can find all agencies offering this service on the Digital services section find it through this link 
http://www.entasher.com/serviceprovider/4/Digital-Services

2- Browse by Projects, if you would like to browse by projects done for other clients you can use the filter to find out the service you like for example you need branding service and would like to see projects already done you can check out from this link:  http://www.entasher.com/projects

3- Browse by clients, another way it might help you for finding the best agency is browsing by the client it's easy to use go to clients section  http://www.entasher.com/clients chose the industry of the field you want and browse the projects done 

4- Requesting quotations, once you like certain agency you can easily request a quotation for the service you want through " request quotation tab" on each agency profile

5- Download company portfolio, on each agency profile you can click on download company portfolio tab  

6- Tenders, if you have a big project and need to create tender to receive many quotations from agencies you can do it in 2 minutes only through " create tender tab on the home page "

7- OOH advertising, through the outdoor section you can easily create your outdoor campaign, chose the location from the filter, chose the type of the billboard you want then add it to your campaign  http://www.entasher.com/outdoor-advertising

8- We didn't forget to help you creating your indoor advertising campaign, through the indoor section you can choose from the highest traffic malls and select the ad you want and then add it to your campaign, yes it's as simple as that.